During an install of 6.5 SP3 from an overlay image the server could not
copy a file relating to SMDR. The only option seemed to be a Skip File
or Retry (did the same thing) so I skipped.

Is there a way to extract the SMDR.nlm (which is missing from the disk)
and associated SMDR files from the overlay CD manually or else from the
normal SP3 file which I have just downloaded (all 500MB of it).

If so what files or method should be used.

Many thanks for any help that you can provide.