I have a similar problem (reference thread http://www.pchelpforum.com/office-so...tml#post390108)

I cannot get rid of my Office XP (2002/Office10) installation. I upgraded from Office Pro 4.3 to Office Pro 95 to Office Standard XP and have now installed Office Pro 2007 (I bought a full version of 2007 on sale - the last full version was 4.3 - the rest were upgrades). The 2007 said it would remove old versions but did not. I have tried different utilities, including the uninstall utility from the Office 2003 toolkit (ork.exe) and many files are removed, but it still shows in my add/remove program list. When I try to remove from there I get an error "installation source not availabe" - this is the same error when I insert my Office XP (2002) CD and try to do anything. My research says there are probably missing files in the installaton but I can't tell which. I would be willing to follow a specific set of instructions to edit my registry or startups or whateve to finally make the old one just go away, but I cannot find one that addresses what I need to do to remove the 2002 specific files (lots of stuff like that out there for 2003, though).

HELP?