']From
http://www.microsoft.com/office/editions/howtobuy/professional.mspx
Upgrade Eligibility
Determine whether your current version of Microsoft Office qualifies
you for
the $329 US upgrade price. The following products qualify:
..Microsoft Office XP
Office XP Developer, Office XP Professional with FrontPage®, Office XP
Professional Special Edition, Office XP Professional with Publisher,
Office
XP Professional, Office XP Small Business Edition, Office XP Standard
..Microsoft Office 2000
Office 2000 Developer, Office 2000 Premium, Office 2000 Professional,
Office
2000 Small Business Edition, Office 2000 Standard
..Microsoft Office 97
Office 97 Professional, Office 97 Small Business Edition (version 2),
Office
97 Small Business Edition (version 1), Office 97 Standard
..Microsoft Works
Works 6.0, 7.0, 8.0, or 8.5
Works Suite 2000, 2001, 2002, 2003, 2004, 2005, or 2006
