Office 2003 PIA Prerequisite in the .Net framework and Office 2007

Question

What happens when the Office 2003 PIA prerequisite and launch condition in a Windows installer are run against an Office 2007 system?

Answer 1

Yes, it will fail unless for the simple reason that Office 2003 is not installed. We create separate installers for Office 2007 and Office 2003.

Also, there is a difference in the structure of Office 2003 add-ins versus Office 2007 add-ins.