Ah, ok, so i´ll have to be patient
@Pancakes : Thanks! I try to get used to csgs, and just painted a simple boxtexture, to see how the mapping works with csg and how the integration of photoshopfiles works. This is a feature I like a lot. Just pain the texture and its instantly refreshed after saving.
This one is very reusable, but when its finished, the "boxsign" won´t be there anymore