Jim,
If you have SilverFast (might be possible in Photoshop but I've never tried)
it is possible to reduce the grainy look (aliasing) by using the Descreen
filter. I posted a short tutorial on this a week or so back to my web site.
http://www.rgbnet.co.uk/ilyons/sf5-negafix/grain_reduction.htm
It also contains a link to a very informative article that I think was
written by one the list members.
Ian Lyons
http://www.computer-darkroom.com