You could create a Custom Code Set brand JVC category Supplemental type projector. Then add whatever the commands are that you want. Command format is as they document, for which the simplest way to write in Roomie is escaped hex like:
<key>LENS MEMORY RECALL 1</key><string>\x21\x89\x01\x49\x4E\x4D\x4C\x30\x0A</string>
The part between the string values would be what you’d paste into Roomie, except for your custom command.