Because I could work around the problem by morphing/clothing/posing figures inside Carrara, I decided to buy it. (Build the equivalent of cr2s inside C5 itself.) I picked up C5 Pro and installed it, and lo and behold, .cr2 import works perfectly in the new version. I'm experiencing occasional "Memory Allocation Error" render failures, but other than that, the program appears solid. Interestingly enough, in one case simply moving the camera made that error go away.