I am not sure but I THINK the configuration stuff is one way communication to the radios. Meaning the OI & RC send the radio configuration info (channel, etc) but I the radio doesn't necessarily send data back to the OI or RC. After config, I think it goes into Rx/Tx mode where all the packeting stuff is handled (CRC checks, etc.)
If I were you I would e-mail Paul at E-wave. He has been pretty supportive of side projects in the past. Alternatively, e-mail
Zondag from the Killer Bees, aside from being a great guy and the heart and soul of Team 33 AND the coding Guru for the Bees, he did a reverse engineering job on the FIRST radios back a few years ago. If you convince him your intentions are legitimate, he may share some of what he discovered. I can't promise but it never hurts to ask.
Oh yeah, while I am thinking about it, you don't have to stay with RS-422 radios.
$49 or so will get you a converter from RS-232 to RS-422.
Good luck.
Joe J.