The /proc/empeg_notify interface accepts 32-bit (well, actually 24-bits -- the high byte is "reserved" for internal use) hex codes for press and release events. They don't have to be "names".

Then, Hijack's built-in IR-translation mechanism can convert those internally to standard empeg action buttons.

So if you can reduce that 32-bit raw value down to 24-bits, nothing new is needed and it can fully leverage the existing feature set.