Unique Macintosh Identification

[Ken Ray]

This is slightly off-topic, but does anyone know how to uniquely identify a Mac? We're trying to set up a specific install that works on a set number of machines by getting a unique ID for the machine and using it to verify that the machine is "licensed". This doesn't have to specifically be through MetaCard (it could be AppleScript, XCMD, gestalt selector, etc.).   Thanks!   Ken Ray Sons of Thunder Software Email: [EMAIL PROTECTED] Web Site: http://www.sonsothunder.com/