Ok, what version of Max do you have, because I know on the downloads site the patch is for v. seven, although I have heard of patches for later versions. (not sure where to them find though). I don't know about Cinema4D, but if you can export from either into common formats (.3ds among them), you could import them to blender (google blender 3d), and use the xml exporter, then convert it with glexemel. (search the forums for instructions, oh, and it DOES work)