Well, i'm trying to work on a set, w joints, and when i'm tryn to see the texture in game, i can't see it. I saved the file as j_neck.tga, still no result.

Double check the exact Width x Height of the file itself.

Make sure you are using default or pure joints and to /lp 0 tori then /lp 0 namehere so that the customs update.

do not dl yourself
just lp and it should work
save files 512x512

Don't forget to change the item.dat-file for the player you're trying to equip.

just delete the item.dat file from the folder you put in the texture and it will be shown (without force/relax or other items coz they contain in item.dat file)