when i bought 3D commercial , i got an additional disk. I had to extract the file on the disk in my 3D directory and then there was i file with username and password.
But i dont know anything about the sybex 3D versions
I bought it from the net. I got the 3d game studio CD and the manual-book. There is no second CD. And I really bought it, as I already said, for ~80€ from the net.