Català - Castellano - Deutsch
When exporting files from Program to Program the best way to go is to to the export directly between this two formats. Generic formats like 3Ds work, but tend to make the process tedious, and generally the resulting file needs some clean-up.
For the transition between Rhino and SketchUp, there is a Plugin to export files from the former to the later directly.
The plugin can be downloaded here. More information about it, on the McNeel website.
I've been out on vacation for a couple of weeks. I'll try to catch up with lots of posts I have on a list during the next weeks.