Hello patrick2518,
The Product Key (PK) on the Windows Vista Certificate of Authenticity (CoA) is for Windows Vista ONLY; that PK will not work to activate a trial of Office 2007 nor will it work to convert a trial of Office 2007 into a perpetually licensed copy of Office 2007.
If you have not yet activated your Trial of Office 2007, please see this page for instructions on how to do so:
http://office.microsoft.com/en-us/products/HA101759021033.aspxIf you cannot locate the materials with the Office Trial PK, you can get a new PK to start your Trial at this site:
http://us20.trymicrosoftoffice.com/oemsplash.aspx?rps=1&culture=en-USFor much more detail on how to convert a trial of Office 2007 to a perpetually licensed copy of Office 2007, please see this MS KB article:
http://support.microsoft.com/kb/927756
For great advice on all topics XP, visit http://www.annoyances.org/exec/forum/winxp