24 (inches) x 300 (dpi) = 7200 (pixels) 36 (inches) x 300 (dpi) = 10,800 (pixels) I learned that equation from Karl, here in this forum some while back, and it's been very helpful! :) I'd suggest sticking to RGB and yes, use photographic paper for the best result. As for printing services, I really don't know! I received some spam a couple days ago that might help, but I haven't checked this place out, so use caution: http://www.PrintOnClick.com I think you could print it easily enough yourself. The hardest part would be having a printer that will handle the size of paper you're aiming for. But I'm not a print expert around here. So hold on and wait for Karl and Laurie and... ! :)