Thanks Will.  I did just that and I got my modeling done, but I'm stuck on "Poserizing."  I can drag and drop the OBJ I made into DAZ Studio just fine, but I can't make the whole modified CR2 thing work.

Maybe the Poser forum is better for this stuff?  I copied and edited the original CR2 to point to my new OBJ, but when I load it into D|S, it doesn't appear.  There's another, unmodified OBJ the CR2 points to, and that loads in fine.  My part doesn't.  There are quite a few options in the Riptide exporter and I don't know if these settings are the problem, or if it's something I did in C4D.  What I really need is a step-by-step tut on using C4D & Riptide to modify the OBJ of a Poser product and make sure everything exports correctly.

I think the first thing I'm going to do is try to import and export the OBJ with Riptide without touching it, to see if that works.  If it does, I know it's something I did while modifying it.  If not, I know it's probably exporter settings.