First you watch SWEGTA's lua tutorials:
Bully Lua Tutorial - Basic SetupThen when you made your script working, then you can put codes that you want.
For example:
This code will make the player have Gary's full style ---- PedSetActionTree(gplayer, "/Global/Nemesis", "Act/Anim/Nemesis.act")
Player will have Russel boss style --- PedSetActionTree(gplayer, "/Global/BOSS_Russell", "Act/Anim/Boss_Russell.act")
Greaser/Jock/Preppy/Nerd's A striker style -- PedSetActionTree(Nerd1, "/Global/X_Striker_A", "Act/Anim/X_Striker_A.act")
Replace "X" with the style you want.
If you do "G_Striker_A" you will get Greasers A strike.
This was just some basic things if you want to learn how to switch style.
Ask me or anyone if you have any questions