Final Fantasy Hacktics

I noticed in shishi there are 3 "???" sprites.  are those useable for custom sprites?  I kinda wanna make Rad into a Red mage, and the 2 female knights that join you with Rad special sprites and make them into holy knights.

I'm 99% sure you can use those, set the sprite number of the three ??? to the character you wanna change them into in the patcher. make sure in shishi you have the right type of sprite selected (1/2 or monster)

awesome.  thatll make my plans easier.  I am currently using chapter 1 delita and algus for custom sprites since i just finished chapter one.  wanna add in some more custom sprites and since those 3 should be useable that will make it easier

alright, new question, it pertains to custom spriting so I figured I'd just bump this topic instead of being a nuisance and making a new one.  in shishi, sprites 56-5B are all male squires, then the 3 "???" spirite sets.  are any of these male squire sprites used in game?  and if not, how would I go about putting them to use after I overwrite them with my own sprites? 

You have to research in the patcher which ones are used, and if they are, switch them to the normal squire, so the slots are free.

okay thats easy enough, just time consuming.  My question is once that is done and I have inserted my custom sprite, how do I go about applying a special job and make it so the sprite appearance is fixed, like "holy knight" or w/e to the sprite, and then add it into my party?

also, thank you so much GeneralStrife, for helping me and my newbie questions.