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 !