Whilst trying to figure out why a friends version of Virtual PC wouldn’t work I stumbled across a great little app called DeInstaller (find it at Version Tracker), which goes through all of you installed apps and allows you to view whats been installed and uninstall everything if you want to. I found that Virtual PC had left the remnants of a bad install in the Library, so just deleting the app in Applications was not going to work.

try it out, might help a few people with problem installs and removing software they don’t need.