I posted my question to rec.photo.darkroom
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http://groups-beta.google.com/group/rec.photo.darkroom/browse_frm/thread/a6d46e2c0898a922/dd3065d29
e11bae4#dd3065d29e11bae4>
and towards the bottom of the page I received a very interesting
response.
So based on what was suggested, I would put the print at the bottom of
the enlarger and a photosensitized board where the negative would be.
Illuminate the print out and the the board will be exposed and the
image reduced. He mentions this using a process camera, but
it may be doable with photographic enlarger.
My next question, which I posted, was to ask if an lcd display could
be put in place. Of course this would require a photoresist that works
in the visible range. Not sure if that exists or not. If that is
feasible it would be possible to go directly from cad work directly to
exposing the board. If an appropriate jig is used it should be very
easy to do double sided boards as well.
Initial alignment could be tricky as well, but should not need to be
altered once it is set.
I sense a lot of scepticism about my idea, but to me this sounds much
more promising and maybe even easier than even what I had originally
envisioned.
I guess time will tell.