I'm only answering all this to the best of MY knowledge. Could be wrong on some parts.
Modding FFT
In general, to be precisely, what can I do modding FFT?
Can I insert new items, abilities, character slots (insert more room for new units in my party), monsters, maps and music?
Generally no. You can edit existing ones, and there are some unused slots for many things.
Can I translate all the content of a ROM to any language?
In theory. If you're willing to dedicate a lot of time.
Can I play mod in PS1 console? Is mods just designed for working on PC?
Depends on the mod.
Can I insert options for game languages?
If you were willing to spend 10 years doing it maybe.
What's my limits modding? If I'm going to CD by playing my mod version on PS1 is my limit the CD's limit (700mb)?
Not sure.
Can I add new chapters to the game?
Yeah, if you spent time compressing the game's existing events and progression down to make room for it.
When starting in a ROM for modding, is it better using a USA, EUR or JPN one?
Probably USA.
Modding Tools
Considering I'll be doing all the work alone, what will I need for spritting and coding?
We have a subforum for that. Hacking/Patching Tools.
What tools for modding can do for me? Can I have any shortcuts modding through tools?
Depends on the tools. "Shortcuts"?
About saves and these things... Would I need to restart the game everytime I release a patch?
Depends on what you did.
Knowledge
I lack about any knowledge of this area, it's my first time modding and I don't know even how to start and what I can start doing. Could anyone give me a path? Or maybe, advise me one?
Start by tinkering with FFTPatcher & TacText, then with event editing. Use the PSX version.
I have a lot of things I wanna insert in the game and make it be as I dreamed. So, what will I have to know before start modding? Which type of knowledge will I need for modding? What kinds of resources will I need to master?
We have a subforum for this too. Tutorials.
In the past, I was a mod of a forum, can BBcode help me with something modding?
Uh. No. But fluency in that sort of thing might make some stuff marginally easier.
PSX/PSP
Correct me if I'm wrong but it seems PSX version have more support for modding. Am I right? Why?
The gist of it is, the PSP version is a functionally emulated mod of the PSX version with most additions being crudely nailed into the PSX version. It's like slapping two new floors on the top of a house without properly reframing the existing ones. It might work, but if you try to go back and tinker around with the lower floors after that you're probably going to bring the whole thing down on your head.
Can I insert PSP features in PSX version? Most, I would want to add a co-op way of playing and a system of battles for PvP.
In theory, yes. But you'd probably have a more realistic chance of winning the Olympics and/or the lottery.
Can I do it using PSX?
??? Why would you need to insert PSP version features into... the PSP version?
I saw things on forums about a kind of shop, what kinds of shops can I add to game?
A synth shop, thanks to Xifanie's relentless work on it. On your own with no knowledge? That's it.
Treasure/Propositions
Can I add classes/items/units to it as rewards?
No.
Can I add cutscenes to it? After having succeed or don't?
No.
Can I add CG scenes to PSX version?
I doubt it.
Can I add more functions to this system?
Through ASM.
Can I make Propositions repeatable?
Maybe?
Classes
Can I add more classes? Or can I just edit the existing ones?
Generic classes, you have to edit existing ones. There's room to make up some more special unit classes.
Can I add more races? (i.e., human, viera, nu mou, etc.)
Not the way functional human generics work. You could make them special units.
What can I add as pre-requisite for classes?
Any other generic classes you like.
What's my limits adding classes?
Open FFTPatcher and find out.
Can I give classes more inate abilities? Or there's a set number?
Up to 4. Don't give them innate reactions.
Items
Can I add more items? Or can I just edit the existing ones?
Edit.
Can I add more item slots? (i.e., a second acessory, a shoulder slot)
No.
Monsters
Can I add more monsters? Or can I just edit the existing ones?
Edit.
Can I make all monsters playable? I'm aiming the demons cuz we already can't use them by just playing the game normally.
Absolutely. However, some units may not have a Formation sprite, which can cause a graphical error. Does not affect gameplay.
Map
Is there a map editor that can save me time for mapping?
Yes. Ganesha IIRC
Is there any templates for mapping?
Maybe? Never done it.
Space
About space needed for modding, how much of my hard disk would I need for it? I have a ambitious project in mind but I think I must cut some lines...
The biggest thing is probably going to be the size of your ISO file and how many ISOs you have.
Templates
Is there any templates for start modding?
Check Tutorials.
Is there any templates for start codding?
Check Tutorials.
Backup
What can I do to prevent losing my project due to corrupted files?
... Make backups?
When modding, what can corrupt my files?
When modding, what parts of my PC can get affected/damaged?
Is there any risk to my hardware/software by modding?
Nothing. What the hell kind of programs have you been using?
Team
How can I get inside a project and be a member of a team developing a mod?
There isn't a walkthrough to this sort of thing. If you impress someone with your dedication you might be asked to help, but that's about it.
About teams, is there any staff team from the forums or everyone can start a team and start recruiting for it.
Not really.
Testing
Is there a group of testers from the forums?
Sometimes we ask if people want to test things. Not all that often though.
Modding FFT
In general, to be precisely, what can I do modding FFT?
Anything is possible as long as it is within the hardware's limits. (ie. disc space, RAM, Video RAM, processor, etc.)
Can I insert new items, abilities, character slots (insert more room for new units in my party), monsters, maps and music?
Generally no. You can edit existing ones, and there are some unused slots for many things.
Can I translate all the content of a ROM to any language?
In theory. If you're willing to dedicate a lot of time.
Can I play mod in PS1 console? Is mods just designed for working on PC?
Depends on the mod.
Can I insert options for game languages?
If you were willing to spend 10 years doing it maybe.
What's my limits modding? If I'm going to CD by playing my mod version on PS1 is my limit the CD's limit (700mb)?
Not sure.
Can I add new chapters to the game?
Yeah, if you spent time compressing the game's existing events and progression down to make room for it.
When starting in a ROM for modding, is it better using a USA, EUR or JPN one?
Probably USA.
Modding Tools
Considering I'll be doing all the work alone, what will I need for spritting and coding?
We have a subforum for that. Hacking/Patching Tools.
What tools for modding can do for me? Can I have any shortcuts modding through tools?
Depends on the tools. "Shortcuts"?
About saves and these things... Would I need to restart the game everytime I release a patch?
Depends on what you did.
Knowledge
I lack about any knowledge of this area, it's my first time modding and I don't know even how to start and what I can start doing. Could anyone give me a path? Or maybe, advise me one?
Start by tinkering with FFTPatcher & TacText, then with event editing. Use the PSX version.
I have a lot of things I wanna insert in the game and make it be as I dreamed. So, what will I have to know before start modding? Which type of knowledge will I need for modding? What kinds of resources will I need to master?
We have a subforum for this too. Tutorials.
In the past, I was a mod of a forum, can BBcode help me with something modding?
Uh. No. But fluency in that sort of thing might make some stuff marginally easier.
PSX/PSP
Correct me if I'm wrong but it seems PSX version have more support for modding. Am I right? Why?
The gist of it is, the PSP version is a functionally emulated mod of the PSX version with most additions being crudely nailed into the PSX version. It's like slapping two new floors on the top of a house without properly reframing the existing ones. It might work, but if you try to go back and tinker around with the lower floors after that you're probably going to bring the whole thing down on your head.
Can I insert PSP features in PSX version? Most, I would want to add a co-op way of playing and a system of battles for PvP.
In theory, yes. But you'd probably have a more realistic chance of winning the Olympics and/or the lottery.
Can I do it using PSX?
??? Why would you need to insert PSP version features into... the PSP version?
I saw things on forums about a kind of shop, what kinds of shops can I add to game?
A synth shop, thanks to Xifanie's relentless work on it. On your own with no knowledge? That's it.
Treasure/Propositions
Can I add classes/items/units to it as rewards?
No.
Can I add cutscenes to it? After having succeed or don't?
No.
Can I add CG scenes to PSX version?
I doubt it.
Can I add more functions to this system?
Through ASM.
Can I make Propositions repeatable?
Maybe?
Classes
Can I add more classes? Or can I just edit the existing ones?
Generic classes, you have to edit existing ones. There's room to make up some more special unit classes.
Can I add more races? (i.e., human, viera, nu mou, etc.)
Not the way functional human generics work. You could make them special units.
What can I add as pre-requisite for classes?
Any other generic classes you like.
What's my limits adding classes?
Open FFTPatcher and find out.
Can I give classes more inate abilities? Or there's a set number?
Up to 4. Don't give them innate reactions.
Items
Can I add more items? Or can I just edit the existing ones?
Edit.
Can I add more item slots? (i.e., a second acessory, a shoulder slot)
No.
Monsters
Can I add more monsters? Or can I just edit the existing ones?
Edit.
Can I make all monsters playable? I'm aiming the demons cuz we already can't use them by just playing the game normally.
Absolutely. However, some units may not have a Formation sprite, which can cause a graphical error. Does not affect gameplay.
Map
Is there a map editor that can save me time for mapping?
Yes. Ganesha IIRC
Is there any templates for mapping?
Maybe? Never done it.
Space
About space needed for modding, how much of my hard disk would I need for it? I have a ambitious project in mind but I think I must cut some lines...
The biggest thing is probably going to be the size of your ISO file and how many ISOs you have.
Templates
Is there any templates for start modding?
Check Tutorials.
Is there any templates for start codding?
Check Tutorials.
Backup
What can I do to prevent losing my project due to corrupted files?
... Make backups?
When modding, what can corrupt my files?
When modding, what parts of my PC can get affected/damaged?
Is there any risk to my hardware/software by modding?
Nothing. What the hell kind of programs have you been using?
Team
How can I get inside a project and be a member of a team developing a mod?
There isn't a walkthrough to this sort of thing. If you impress someone with your dedication you might be asked to help, but that's about it.
About teams, is there any staff team from the forums or everyone can start a team and start recruiting for it.
Not really.
Testing
Is there a group of testers from the forums?
Sometimes we ask if people want to test things. Not all that often though.