Copying movies from ATV to Mac

Sorry for being such a newbie. But if I rent a movie in iTunes on my Mac, I can send it to my ATV. However, if I rent it on my ATV, I do not have the option of sending it to my Mac. With ATV Flash installed, can I get the movie to my Mac?

Let me clarify my question in hopes of getting an answer. Thanks to ATV Flash, I can access my ATV & copy files back & forth. But if I rent an HD movie on the ATV, I can not get it to work on my Mac. And obviously, I can’t rent HD movies on iTunes on my Mac.

So, how do I get an HD movie rented on my ATV onto my Mac so I can watch it?