It's JP1 time. Neither of those are in the built-in library but device upgrades including discrete power and input commands are available in the JP1 files. If you can solder, you must solder in the 6-pin header in the 7800 and build a JP1 cable. Is that is too daunting, you can buy several JP1 ready remotes for $20 - 30 and a cable for $15.
More information here.
More information here.