I'm assuming it's "locked" the same way other aps like Adobe CS2 are: - You install the software. - You enter the serial number. - You register your serial number. - You get an authentication number for your machine from vue (probably via the web with prompt from screen "wizards" upon first launch, or with a phone call option for the 2 people in the Appalachians that don't have web access). You may or may not have to enter the authentication number manually upon email receipt of auth. number if not the "automatic" way. If you want to move Vue to another machine. You contact vue. You may or may not have to "de-authenticate" your machine. You repeat the installation process for your new machine, and authenticate that machine with a new authentication number from Vue. It sounds convoluted and a pain in the but, but if they implement it the same way Adobe did (at least IMHO) it is quick and painless. Although given the choice, the license server sounds better. I use C4D on a mac and would love to see what 6-extreme is like but their site only mentions 6 extreme for the PC. Anybody care to comment on how much a difference there would be between the more seamless workflow of Extreme with 2 way native interaction between vue and C4d vs. 6 infinite with the C4D plugin? I can't tell if they have the same working features but X is more fluid than I + plugin, or if X has different/more/better features beyond better integration between 2 aps.