Final Fantasy Hacktics

So i have a PSTV with the Digital Version of WOTL.  Im in Ch.4 and my Party are high levels and i want to add characters like Delita.  How do i get the save.

I was on a Reddit forum and someone gave me this advice.  I just don't know how to get the save.  Am i going to have to mod my PSTV?  It wont be a problem if i have to. 

Here's what this person told me.

I don't have a PSTV, so this will all hinge on if you can find a way to access your save game data from that system. If so, you are looking for:
\SAVEDATA\ULUS10297FFT0000\FFTA.SYS
Move the entire folder containing FFTA.SYS to your PC.
You need to decrypt the save. This is easiest by installing PPSSPP.
Browse into the folders and place the save folder inside the save folder:
\ppsspp1.9.4\memstick\PSP\SAVEDATA\
Adjust one configuration file:
\ppsspp1.9.4\memstick\PSP\SYSTEM\ppsspp.ini
EncryptSave = False
Run PPSSPP, load your save, and save again in-game using the menus. This will overwrite your FFTA.SYS file with the decrypted version.
Rename the FFTA.SYS to lioneditor.bin
Finally you can run LionEditor 0.147 to edit this save. Make whatever changes you like.
Rename the lioneditor.bin back to FFTA.SYS
Edit the PPSSPP configuration again to EncryptSave = True
Run PPSSPP and load, then re-save, your game again.
Copy the folder back onto your PSTV.