Is this the Knowledgeable Base article you used?

How to uninstall the 2007 Office system if you cannot uninstall it by using the "Add or Remove Programs" feature
http://support.microsoft.com/?kbid=928218

Are you trying to uninstall as administrator or under a different profile?

If you still cannot uninstall, I'm afraid you're going to have to have somebody at your machine to help you.