Hey all.
I dunno if this has been discussed before, and all you smartypants probably already figured it out. But in case you never thought about it, here's a suggestion for having a very flexible radio panel.
1) in your OpFp Editor, add a trigger for each radio channel (alpha through Juliet)
2) For OnActivation use RADIO_ALPHA_PARAM exec RADIO_ALPHA. (Naturally, change ALPHA to correspond with the radio channel)
3) In INIT.SQS add the following stuff
;; Radio Shenanigans
RADIO_ALPHA         = "test.sqs"
RADIO_ALPHA_PARAM   = [GetPos QuarterMasterBill, "LOL!"]
RADIO_BRAVO         = ""
RADIO_BRAVO_PARAM   = ""
RADIO_CHARLIE      = ""
RADIO_CHARLIE_PARAM   = ""
RADIO_DELTA         = ""
RADIO_DELTA_PARAM   = ""
RADIO_ECHO         = ""
RADIO_ECHO_PARAM   = ""
RADIO_FOXTROT      = ""
RADIO_FOXTROT_PARAM   = ""
RADIO_GOLF         = ""
RADIO_GOLF_PARAM   = ""
RADIO_HOTEL         = ""
RADIO_HOTEL_PARAM   = ""
RADIO_INDIA         = ""
RADIO_INDIA_PARAM   = ""
RADIO_JULIET      = ""
RADIO_JULIET_PARAM   = ""
4) Create the file "test.sqs" and do whatever you want as a response to the radio command.
The cool thing with this is that now you can change RADIO_X and RADIO_X_PARAM during your mission to make your radio behave completely different with great ease.
Happy Scripting!