JP1 Remotes

I have both the OEM remote for the 360, and a URC-8910.
Then what's stopping you from learning the button and letting IR.exe tell you the code.

I am not an idiot.
There is no button on the OEM remote that I can find which controls the
"output mode". I am asking if anyone else has been able ...

You need to provide more information.

What remote are you using?
For the 360, what setup code or device ugrade are you currently using?
For the input selection, what TV do you have? What setup code are you using?

I have both the OEM remote for the 360, and a URC-8910.
When using the URC8910, I ...

There is a button on the 360 box that selects between DVI-RGB/Component
outputs being active (It's labeled output mode, if I remember correctly). Has anyone found a remote control code that will access this function? Also, has anyone been able to find discrete remote codes for the input source ...