The challenge code is entered during registration and is a safeguard against illegal distributing. You transmit, email, or read over the phone a number found with your purchase. You receive another code via the same medium to enter into Poser. There are a lot of potential users concerned about this and are quoting George Orwell. The Pro-Pac Service Release, a free download, was also going to have it but CL decided to rely on users reporting its illegal use instead. Id hate to think this is holding up the Mac version. I wonder if CL can hear this? HELLO? CL? ... (Whispers) - Better not be so loud, in case someone else can hear. Virtual PC from what I hear is not so clever with 3D aps and didnt work with Mimic. (?) purplehayes I like your low end Mac. Blows mine out the window! Still, I need to get a new burner so, what the heh, Ill get a new computer.