I think what you really want are custom image sets, set to loop seemlessly...correct? I think we would all welcome any custom image sets that cater to 5, 6, 7, 8 and 9 desktop setups. (3 & 2 desktop sets as well for that matter). I wouldn't mind contributing in my spare time...
Only issue is my spare time is very hard to come by....but I'll try to do something