Tony,
Thanks for the information and the link before, yes it makes sense that you would want codes to be different when controlling other devices. I will look into that 15-1994 remote. I'm sure the Rio Receiver will never be included as a device in any Universal remote, that's why I thought they might have made it similar to another device.

I wish someone from Rio could post the remote's control codes, I couldn't even find them in this extensive Cross-Ref list. You never know, may just match someone else codes.

I've also checked Remote Central.com couldn't find anything about the Rio's Remote. Has anyone been able to program a learning remote to control the Rio, without hacking the 15-1994? Maybe I'll give it a try.