thanks for your posting.

The URM-15T should be the "Keyspan Remote for iTunes" package. Are 
you using the included hardware with Remote Buddy? 
(I'm asking, because I could add that package to the compatibility 
list as well, then)

That said, the receiver is not bound to a specific protocol as far as 
I can see. It should basically support receiving any command that is 
sent within the receivable range of its IR diode.

Adding the capability to learn new IR codes to Remote Buddy's driver 
for the Keyspan IR should in fact be well possible and not too hard 
either. It's just a question of time.

In contrast to that, the Apple IR receiver does not seem to be able 
to support any other IR commands than those of the Apple Remote. You 
can find more on the Apple IR receiver and its capabilities in the FAQ.

Best regards, 
Felix