The Rii remote might be sending a standard signal, accepted by say 75 or 80% of the mainstream boxes, but it’s not the correct signal to power on your odroid. Correct?
Therefore your problem is how to program the correct signal (aka hexadecimal code) into the remote.
To achieved that, you require a transmitter (read other remote with working code).
You could try to inject the bl301 blob, however, based on my experience with the MX3 Air Mouse, I doubt it will make a difference. It’s a one in a billion shot that it might work.