Corel Dream 3D was actually almost identical to a product called Ray Dream 3D. That product evolved into Carrara Studio, which is now sold by DAZ 3D. I believe that Carrara 6 is also able to open Dream 3D files, but I cannot guarantee that. There might be a trial available to check it out first.
Gérard
CorelDRAW Graphics Suite X4 (Service Pack 1)
Corel DESIGNER Technical Suite X4
OS: Windows Vista Enterprise / CPU: Intel Core2 Duo / Memory: 2 Gb RAM / Graphics card: nVidia Quadro NVS140M