Eh, what? Not sure if this is what you're looking for exactly, but...
You can set the text of the radio message in the trigger itself - one of the fields does it - or you can do it via a script:
1 setradiomsg "blah blah blah"
Where 1=Alpha, 2=Bravo, and so on. This is useful for "hidden" radio commands you want to make visible at a certain time.
I think 0 is actually after 9 rather than before 1.