This is not the case with activation. I have had 1.1 installed on 2 computers with the same number, Different hardware. I did this to test my problems I was having to see if it was hardware related or what. I ran both copies at the same time online because my problem was only with online gaming. I did burn an activation to do this. But they both ran just fine, as far as starforce is concerned. Didn't help much with my problem except I found it wasn't machine specific.
A reinstall of windows is seen as a Hardware change with starforce.
Even if you use your backup of the RegKey. So that burns another Activation.
Starforce isn't any better then any other copy protection except that It really hurts the Legit player, it works when it isn't supposed to work and doesn't work when it should.