Thanks Martin,
yes, I will. I just finished to render the Kuhn model. As I wrote, I had to separate the whole thing, since it was just one model, no groups, no whatever and then isolated each single part to texture the whole thing. I downloaded lots of reference images and tried to make it look like the real thing. For some parts I couldn't find any images, so I had to use my imagination.
Since the two models (NASA and Kuhn) show different stages of the configuration, I took some parts of the NASA model and sticked it onto the Kuhn model. I don't know, if this is correct, but I thought it looks cool.