How to change ped fighting style

[Templario]

I want to change four peds fighting style, Lance, Trevor, Gordon and Ivan to the Nemesis (Gary) Fighting Style in the Ide.Img (Freeroam) but i can't do it, someone can teach me how to do it? i know the codes are (i think):

F_Jocks.J_St
riker...Nemesis.
J_Grappler......
/Global/Nemesis.
Act/Anim/Nemesis
.act....

And i have to use the swap method, but i tried and it keeps crashing, i'm doing something wrong and i don't know what, also i want to use the method of the unspawned characters so nobody loss their original fighting style, only these non clique.

Edit: If it helps, i don't need the full nemesis style, i only want the straight kick of Gary, if is possible to mod GS_Male_A and add the Straight Kick, it will be easy.

[Darth maul]

Sadly you can  give nemesis fight styles to different peds only from Lua     

[Micha]

It's definitely possible to add the Nemesis fighting style. It's only a bit more difficult because you have to move some things around and change some more stuff than usual.