I'm running XP Pro. Originally my desktop background was 1680 X 1050 and the resolution under the Properties-Settings was 1680 X 1050 but the desktop background was stretched off the screen to the right and bottom. I opened a new picture document and moved the resolution around to find just how stretched the desktop background was. I came to the resolution of 2098 X 1315 and placed the 1680 X 1050 in the upper left corner to get it to center properly as my background. Where can you choose fit or fill?
Nice set up!!!