The blurb on the cnet? site said:

"You'll have to register your copy of Bryce on the publishers web-site to gain access to your free Bryce serial number."  

Don't know how that works let me know how it goes. I thought I'd dl it on this computer (took a whole15 minutes) rather than go into the cold dark room with all the other computers in it . . . besides they're all named Hal and one or two of them has started refering to me as 'Dave' .