It will depend on what model of OFA remote you have. If it has a JP1 header and you have a cable then you can upgrade it to do discrete commands. The newer models have Replay support but cannot be assigned advanced codes without the cable since among other things it uses a two byte command. Here is some more information. [Link: hifi-remote.com]

The www.hifi-remote.com site has information about JP1 if you don't know about it already.

-Jon