rexus, I can test for you if my setting arr different from yours and if it will help. I have WinXP 64 bit, and Carrara 8 Pro 8.1.97 at the moment. And I have a lot of unfinished scenes, which I need to go back to and improve with better lighting and other interesting elements.

About the store, there is http://poserdirect.com/ designed and created by MrSparky. I know MrSparky likes and uses Carrara, so there might be a chance that he will welcome your Carrara submissions at his store. His store is run with the idea of offering affordable solutions, so I think your idea is very much similar and there might be a good collaboration opportunity there.

Hope this helps.