Here's a link to the image resizer that Warren mentions above:
http://www.microsoft.com/windowsxp/D...powertoys.mspx
It's by far the easiest image resizer to use. Just download the program. Then to resize a photo, go to wherever that photo is on your computer and right click on it, click on resize pictures and then tell it whether you want to resize the photo to small, medium or large. It will make a new copy or your photo with the exact same file name except the word small, medium or large will be added to the file name. It's very fast and simple.
Chris