Remember that the "Not Responding" message doesn't mean that SketchUp has quit working. It means it's not going to respond to any further input until it's finished doing the last thing you told it to do. Purging unused stuff regularly should help reduce that. It should also help keep your file performing better.

Thanks! I'll try that to see if it helps

"Understanding Comics" by Scott McCloud. Is a great book about comics, but it goes into a lot of detail about the difference in abstraction and realism, and the importance of it. I can't recommend the book enough. http://scottmccloud.com/2-print/1-uc/index.html

Thanks for the help guys, I apreciate but finally I talked a bit more with inmotion support and we found a good solution. I will be sharing my HDRi's soon (after building my website off course )