Activation Questions

After running a trial of Multiplicity using three test machines I was impressed enough with the product to make a purchase. Unfortunately, I was unaware of the requirement to activate the registered version over the Internet before I made that decision; I've already run into major activation headaches that might make using this software impossible for me.

I will be mainly using the software (when I'm not power gaming with it) in a test environment which is connected over an isolated subnet without Internet access. My primary system and secondary machines are reformatted with a clean install of different versions of Windows on a near weekly basis. The hard disk drives are often swapped out of the systems, but all of the remaining hardware in the machines remains constant.

I don't want to be stuck having to send out another e-mail every time these systems are refreshed - Synergy doesn't give me any of these headaches, but I do really like the route you're taking with Multiplicity and want to stick with it if I can.

With that in mind, I'd like to know if e-mail activation is my answer. If the activation information is based on the underlying hardware (such as the MAC address of the machine), can I simply reuse the same information whenever I need to reactivate on the same machine?