bluestank

I am a student and have a copy of Microsoft Office Enterprise 2007 that I got from the University. I was wondering if it was possible to install it on my sister's new laptop, and both use it simultaneously. I know you could with older office versions, and I read that you can do it with the "home and student" version of office 2007. Anyone know if it is possible with enterprise? Do they have some way of tracking it in the first place? -Thanks