Corel Draw 9 worked great!
You have to jump thru a couple of hoops, but it DID work.
Of course this won't won't work for 'scanned' images in the .pdf. But CAD printed to .pdf does work. Apparently, the conversion to .pdf remembers the 'vector' parts.
The software I mentioned earlier, as I remember, it looked like it actually 'redrew' the lines, thus losing any lengths, linewidths, etc. It also left a bunch of random dots / small lines throughout the dwg. - Redrawing noise as lines.
I guess I am still looking for a software that will redraw the bitmaps to CAD - IF they do a decent job of it.
We REALLY don't want to deal with inserted images of any kind to our dwg.
craigr