yh so make them at 1440X900,
if thats your screen reoltuion thats what you make them for,
if you click hid taskbar then you image will show full screen if u have the taskbar up it will cover a bit of the image, the only way to get past that and this may be what your tying to do, would be to put an irelivant strip of XX pixels at the bottom fo your image is that what your trying to do ??