I don't have the CCT's or Pro.

Maybe I'm confused but are you asking if you can take legacy rigged figure, open the cr2 in DS4 Pro, convert the legacy rigging to the Triaxial rigging and then export it back out of DS to create a Poser weight mapped figure?

I don't see why this wouldn't be possible but it's a lot of steps and the cr2 exporter while it's a good beginning, isn't completely reliable at this stage of it's development.

From a thread quite a while back, the whole purpose of the CCT's is to create rigging for the Genesis platform.  Which is really what Genesis is.