cleaning up word html

Hi, I am looking to clean up the HTML generated by some of the in-browser WYSIWYG editors, especially if you paste in content from Word. Can I install HTMLTidy on my server easily, and call it from PHP easily? Are there other good classes available that clean up HTML? And how would I make a function that takes all tags (between <>), and can do something like: replace <p anything here> with <p>? Links and tips appreciated! Thanks, Peter Smile. It makes people wonder what you're thinking.