Question : "Invalid Partition Table" - What are my options?

An XP Pro SP3 computer stopped booting properly and displays an "Invalid Partition Table" message.  Ultimate Boot CD recognizes the drive and I can access files, but running Recovery from the Windows XP CD does not.  I want to at least attempt a fixboot and fixmbr.  What are my options for rebuilding or fixing the MBR and getting this machine back online quickly?

Thanks.  

Answer : "Invalid Partition Table" - What are my options?

The ASCII code of "*" is 2A (see http://www.asciitable.com/), so the command would be:
reg add "HKCU\Software\Microsoft\Office\11.0\Common\UserInfo" /v "UserInfo" /t REG_BINARY /d "2a" /f