Sorry - i meant before the archiver gets near the files. I thnk the reg key you mention is to preserve the access date once the file is recovered from stub. Which is useful - but not what i mean.
During my testing i set up a test server and restroed what was to be dummy data to ttest the archive on. the probem is that the restore process from a normal file ida has set the accessed date to the current day. Not sure that there's any way around that as technically it'd be creating the files from the backup ;-/