Been pounding my head against OmniPage professional some more and I found a way to make it much less annoying.
What I've done so far is to export all the page images from Acrobat as JPGs, then import them into OmniPage.
What was driving me crazy before was that it does a really bad job setting zones - that is identifying what part of each page is images and should not be OCRed, and what part should be OCRed.
It's slow and tedious, but you can go into each page and manually draw the box for what part is text, graphics, forms or to be ignored.
Then, unfortunately it asks you several zillion times if you'd like to change a word that it scanned correctly to a completely wrong one, plus a stack of places it scans to just plain gibberish.
What's bugging me is I did all that work a couple of hours on one book and it doesn't look like it saved me any space. The raw JPGs are 16 MB, but the RTF output from OmniPage is up about 40 MB
