I too, am looking to program discrete codes for a WS-65909. In downloading the mentioned CCF, it has all the discrete codes except the OTA HD antenna source.
I can put my remote in discrete mode, on and off is a snap, but remote does not have a 'INPUT' button.
I have the following buttons: 0-9, SQV, QV, Power, Guide, Sleep, video, audio, mute, device(toggle), channel (Toggle), volume (Toggle), enter, cancel, menu, device menu, home, info, v-chip, format, pip/pop, pip device, pip-ch(toggle), adjust (4way toggle), rec, stop, pause, rew/rev, play, ff/fwd.

Which of the above buttons do you use for 'INPUT"?
And is DTV source controled by 'pip/pop' button?