Bob, if you have or are stuck with XP, while you don't have snip, you do have alt-printscreen, which captures just the 'active' window to the clipboard. Go to any image editor (like Paint) and paste it in, then you can do the 'box' thing in the image editing software.
I've also used a tool called 'snagit' which is basically the snip tool, but as an add-on application into the windows XP environment. This allowed me to grab images from specific areas on my screen of anything that showed up on my screen, with precision and drop them into powerpoints, word docs, etc. with little fuss.
http://www.techsmith.com/snagit-whats-new.html I used it extensively when I taught courses for GM University at General Motors.