Charlie, there are a lot of image resizing programs that are free. Here are a couple that I have used.
http://avs4you.com/AVS-Image-Convert...FQk65QodCThjHA
I use this with Windows Vista
http://www.microsoft.com/windowsxp/D...powertoys.mspx
Look on the right side about half way down for image resizer.
I think this is only for XP. Not for Vista or Windows 7