Sith, since you have tried ScanPST, safe mode, a last ditch effort could be to use detect and repair, you can initiate it from any office application or from add/remove programs and change the installation, it should require the CD (unless you still have the setup files.) If that don't work you re-create the profile from the control panel and then re-configure the account to use the old PST.

I'm not sure what other tools you can use, unless you have an OST file in there then you could try ScanOST.exe