Multiple Laptop Use Question...

Background...

I am a MWD Operator. I have 4 laptops on my desk at all times. I believe this application will make life simpler for me. Of the 4 computers that I use, 3 run XP and 1 runs Windows Vista Home Edition. The Vista is my personal computer. The other 3 are company computers. I travel from job site to job site. The 3 XP computers are different at every job site, meaning that when we are done with a job, we ship our computers in a kit box back to the shop. When we go to do another job, the office will ship us a new kit box with 3 different computers than we have the last job.

Question...

I am wanting (believe what I need is) Multiplicity Pro. Will this allow me to install the program on different computers as I travel from job site to job site. I will always have my Vista with me so I will use that as the controlling computer. I guess what I am trying to say is I am not clear on how many computers the program can be installed on after buying the Multiplicity Pro license. I understand that I can only control 6 computers at one time, but do they have to always be the same computers?