Use Onkyo remote to control XBMC Mac Mini?

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I have a Onkyo surround receiver with a programmable remote, and I was wondering if it is possible to set up this thing to control XBMC on my MacMini?
I think it can copy controls from other remotes, should I get an apple remote from a friend and copy the commands, or is it possible to run an application to have the Mini take any IR input?

 

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It was quite easy:
You need an Apple Remote to learn from
You can program the Onkyo remote by holding down the mode button with the enter button at the bottom right, so for example CD mode (that one was not in use in my case)+ enter.
Then press the key you want to program, then press the key to learn from on the Apple Remote.

Finally setup xbmc to accept Apple Remote for starting up.