Don't load them into your custom folder, make a fake player, save the textures in there, and then when you open up tbash, loadplayer the fake player to see the textures.

If this still doesnt work, try saving them inot an older version of toribash and doing the same. The only problem here is that you cant loadplayer in versions before 3.3, to get around this, you can edit a replay in notepad to show your fake person playing instead of whoever was actually playing in the reaplay, doing this is easy, all you have to do is open the rpl. file in notepad and change one of the players names to the fake players name.