Is it possible to install Office 2003 and Office 2007 side by side? The ribbon is driving me up the wall.

The only part of Office that you can ONLY have one version of is Outlook - it WILL NOT allow two versions to be in stalled on the same machine.

I would advise doing a clean install - go to the Microsoft site and get the clean uninstaller (search: remove office) and remove both copies of Office first - then install 2003, followed by a custom install of 2007 (this will allow you to choose which versions of each application you wish to install.