Toribash
What exactly do you mean with making them to custom texture?
If you want to make the picture for it yourself, then use paint or download a painting program. When you're done with the picture, go to Shop and click the link named "Textures". Find the trail textures, and upload the pictures from your computer.
[Fr3styL]|TNT|Rooyall: Wanna smell my dick? Me: Why not? Rooyall: That's what I ask the girls all the time..