i found a head in the texture packs that i want to use but i dont know how to find it in the appearence.2da file how do i find it (the name is N_Comn_w_m02)
You will have to look for what you want in it. Follow this guide to fully help you.
http://www.lucasforums.com/showthread.php?t=148638) there you go just follow this step. For kotor one just stop after the revan/starforge robes.