No remote will learn RF from other RF remotes. All remotes that have RF output capability are only transmitting an RF converted version of an I/R code to thier own base station where it is converted back to I/R again. Also, they only work on the specific Channel and ID that you specify when you program it. There are other ways to achieve what you want to do, but not without a bit (or a lot) of expense.
Simon.
I guarantee I'll tell you the truth and I guarantee I'll tell you what you need to know but I can't guarantee that I'll be telling you anything you want to hear.