Thanks for the quick reply,
Where in the uv area is the renaming option?
and when i say colours, i more mean in the paint area, i have painted a texture onto the object and wish to export that out. but it is spread over the diferent meshes, so will be split into individual textures. 1 for the body, 1 for the side door, 1 for the front flap. does that make sence?
Thanks