I loaded a trial version of MS Office 2007 for a college course. After the fact I remembered I purchased already a full version for my iMac. Once I removed the trial version from my Mac Pro and installed the full version, I continue to get a err message stated "this id doesn't support this version of enterprise". I removed and reinstalled the full version several times with no success. I need (I believe) to install the full Office 2007 for school projects. Or is their a good alternative to ensure all facilitators can view/open, and edit all of my submitted work.