I'm making a set for Drakeh, And I already have a finished texture, but I don't have that certain texture item. How do actually preview a texture without uploading it on a real texture?

Just Create new Folders and name it (ex : oosh) on Toribash ( Local disk ( C: ) -> Games -> Toribash(Version) ->Custom
and Copy the Picture to that Folders on Tga Formats, but make sure you give the right name To the Picture (ex: Right Pec as r_pecs.tga). after you paste it all
open the game, and type /lp 0 oosh. and you're done !

kk, thanks Voggy.

maybe you also want to use this to make your joints match the set / textures: http://forum.toribash.com/showthread.php?t=23596

Thanks Cobra and Vog.