Custom Remote Image

I’m adding a custom device to the RoomieCodes plist file and want to use a graphic of the original remote which will appear on the app when this device is selected. I notice you can do this with a selection of included images for remotes from a selection of manufacturers but not from the device I have (Humax Foxsat HDR Sat receiver).

Can I add an image of the original remote and then assign commands to each button?

Yes, Custom Original Remotes are documented with completely functional samples in the DDK:

Thank you.