xp root drive permissions messed up

Hello!

Greetings everyone.

I installed xp (sp2 DIY streamlined) inside drive E: ;
and vista (home premium) in C: .

After I booted into vista, I decided to sort things out ;P so I simply
rename/label drive E: to WINXP (since xp os inside), then the system
warns and requires my permission and I allowed.

Haha, since then, everytime I boot into xp, the system halt at the
login screen, with NO accounts to choose and the screen keep flashing
every now and then.

I tried to boot in vista and checked user permissions for E: drive at
right-click>property>security, compared to another pc and found that one
user (unknownS-1-5-32-547) is missing, I guess this is the problem but
not sure.

Seems I cannot edit that unknown userS-1-5-32-547 to full control E:,
as I propably REMOVED it when I label the drive, can I? (as inside
vista, it is not available to be added as a new user)
Can I somehow extract and import all users from xp to vista, and then
add the user to full control E: ?
Any hints are welcome.


Many thanks,
Harry


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Harryhk