Office Communicator 2005 runs for first login

[Mordac85]

I've added Communicator to our master image but when we load the image and the user logs in for the first time Communicator runs from a value in HKCU\Software\Microsoft\Run. The value isn't there until the system runs through mini-setup so I'm assuming "something" is creating the key during mini-setup. I haven't opened the MSI w/something like IS Tuner yet, and would like to avoid that step due to the approval process I would have to go through. Any other ideas how can I kill this or what's causing it to behave this way?