Microsoft Rules

And I don't mean in the good sense. I mean their stupid rules. I bought XP Pro last year and installed in on my old computer. I'm going to buy a new one and don't want to have to pay for it again so I emailed their support and asked them if I could put it on my new computer and did I need some sort of authentication to do that.

They responded:

Under the Windows XP End-User License Agreement (EULA), we can install one licensed copy of Windows XP on one computer. As long as we follow this license agreement, Windows XP can be reinstalled and reactivated without any limitation. Please perform online activation.

????!! Does this mean I can or can't? One computer at a time or just one ever? And who are "we"? "How are we feeling today?" We are feeling like Microsoft has too much of my $$ already.