You could try using UVmapper to UVmap the van. This will produce a texture map template, similar to the ones for your poser characters. Then, just cut and paste with a paint program or whatever, and you choulsdbe able to scale it... Won't be easy, but I'm sure you'll learn a lot if you try it! (It's the same "technology" used in almost ALL 3D games, might be worth knowing one day)