After a little further investigation, you may want to use the Belarc Advisor at http://www.belarc.com/free_download.html. You can use the magic jellybean link that I sent, but you'll want to remove it immediately afterwards as it apparently is not liked by most anti-spyware programs. That is enough for me to withdraw my recommendation of it. The Belarc Advisor is a pretty handy little program in its own right though.
Belarc Advisor: good stuff.