I downloaded an iTMS movie rental on one computer, but I want to watch it on another ... how?

[Kevin Callahan]

I downloaded an iTMS movie rental on one computer, but I want to watch  
it on another.

I realize there is a way to *move* a downloaded movie from your  
computer to an iPod, an iPhone or an AppleTV, but how can I move it  
from one computer to another ?  It's already paid for, I just decided  
to watch it on a different computer - just as though I had multiple  
DVD players in my house and decided to watch the video in a different  
room.  In fact, this is exactly what's happened.  Am I hosed?  Do I  
have to watch in on the computer that downloaded it?

Kevin