I have an answer for your latest Norton issue. But first...
You're quite welcome for the help. It's a pleasure for me. I always learn stuff in the process (just as I learn stuff every day in these forums by reading other people's threads). I think what it boils down to is NOT that I know more than anyone else, but that I've become pretty adept at knowing where to look, and how to look. Anyway, it's a nice challenge.
I know where you're coming from in just wanting to get it done (reformatting)...just try to remember that little ditty that apparently disabling System Resources before trying to us PM7 to change from NTFS to Fat32 would probably have done the fix for ya. No use throwing the baby out with the bathwater when you don't have to.
Now, on to Norton Disk Doctor and XP. You've been driving yourself crazy over this one, but the deal is that this is perfectly normal. Here's the blurb from Symantec:
Norton Disk Doctor displays "This drive is in use by another process and cannot be repaired... Would you like to schedule a repair" even when there are no problems with the hard drive.
Situation:
Running Disk Doctor with "Fix Errors" unchecked finds no problems. However, when you run Disk Doctor with "Fix Errors" checked, you see the message "This drive is in use by another process and cannot be repaired. A repair can be scheduled to occur the next time you restart the system. NDD can still diagnose this drive if Fix Errors is unchecked. Would you like to schedule a repair?"
Solution:
This is normal and does not necessarily indicate that there is a problem with the hard drive. Norton Disk Doctor will always display this message when the "Fix Errors" option is checked, and you have selected either the Windows NT/2000 partition or a partition containing the Windows Pagefile.
If you answer Yes to this prompt, CHKDSK /F will be run the next time the system is restarted.
----------------------------End of Blurb----------------------------------------
So, while I haven't tried it, NDD has very limited functionality in XP (as well as NT and Win2K). But, the good news is, you don't have a problem.