Well, it kinda worked. On a fresh install, a fair number of the fixes actually didn't appear on Windows Update with only the files on the CD (no registry entries), but it wasn't perfect. Three hotfixes still showed on Windows Update in the Critical section as 0KB downloads (KB885250, KB885835, and KB885836), so apparently they do need registry entries to be properly seen. Overall, it's a pretty interesting find, but I'm going to stick with the tried and true method myself. EDIT: And no, the files are NOT in dllcache and are therefore NOT protected by Windows File Protection.