Wow, that's simply AMAZING, Dinomar - it looks like it was extracted from a Sonic the Hedgehog game or something. You've really got quite some tallent at this - keep making moar graphicz!
Ok, new BG on its way:
This took a while. It's New Super mario Bros world 8-1(or 8-4) I think.
Comments are welcome.
EDIT: download: http://www.smwcentral.net/?p=showexgfx&id=1418