Okay, first back up the World and ide file.
Bear in mind, this process will also give you the Bullies fighting style.
Now then, first open the ide file with HxD, and then what you do is copy from "player...player" to "/Anim/Player.act.." And yes, including those dots at the end. But don't copy anything else. You have to be precise.
Then "paste insert" it into the character you want to replace. You want to play as Gary. So highlight the following: "Nemesis_Gary" until "/Anim/B_Striker_A.act....", then right-click and paste it on there.
Now open up the backup ide file, and copy from "Nemesis_Gary" until "/Anim/B_Striker_A.act...." and paste insert it on "player" until "Player.act.."
Now just change STUDENT into PLAYER1.
That finishes the ide work.
Moving onto changing skins:
Open World with imgtool.
Extract the character model (i.e. Nemesis_Gary [NOT CS_Nemesis_Gary]) you want to work with. There's two files to extract, one with a .nif and one with a .nft
Now, delete the following in the imgtool (both .nif and .nft):
Reminder: Don't delete anything with CS_ in the beginning.
- P_Bandana1
- P_Bandana2
- P_Bandana3
- P_LSleeves10
- P_Pants1
- P_Sneakers10
When that's done, go to the extracted character model files. Highlight the .nif and .nft files, and copy and paste five times. Now there should be twelve files, the same number of files as the ones you deleted.
Start renaming them to the previously mentioned files (P_Bandana1, etc.)
When that's done, click add in imgtool, and choose all the renamed files (highlight all of them and do it in one go).
And you're done!
Now boot up the game, and choose the following clothes from the punk barber in New Coventry:
- Any bandana
- Worn flannel shirt
- Plaid punk pants
- Fat sneaks - grey and white
And Jimmy should change to Gary.
Hope it works.