I know the feeling
try and reset permissions for all disk's
under security advanced force admin
in boot.ini reset from noexecute to execute save reboot
then reset permissions if this works don't forget to edit the boot back cause this will leave machine open to OS script attack
past this info
the rest is hacking and this is wrong place for that
don't forget anything you do to rewrite the os outside of the way MS had it is againest the user policy