Hi Stephen,
As others have mentioned, this contains the backup of files replaced by the
service pack, and will be needed if an existing file becomes corrupt, or you
run sfc. You might set folder options to see hidden and system files if you
are concerned about drive space, as the $NtUninstall....$ folders that exist
in %windir% may still exist and can be safely deleted.
--
Best of Luck,
Rick Rogers, aka "Nutcase" - Microsoft MVP
Associate Expert - WindowsXP Expert Zone
Windows help -
www.rickrogers.org