I'm just heading out, but I'm thinking a couple options without looking into it further:
1. only use the old files as archive. Save it the .pst to another folder/directory and access it via 'archive', delete the old (or disable) the old profile.
2. Or...looking at merging the two profiles into a new one (though if one is really corrupt, you may wish to avoid this (making me think it is best to just use it as an archive).
http://en.allexperts.com/q/Microsoft-Outlook-1541/Merging-2-Outlook-pst.htm3. Maybe re-create the new profile and see if it is possible to do it via backup/restore ... again, if it was corrupt...probably not the best option:
http://www.howto-outlook.com/howto/backupandrestore.htmI'll think more...a few hours of driving ahead...