OK, I think this will work, but i'm not too good at this type of thing
Make a trigger where you want the action will come up. This might be a circle with a 5m diameter on the radio.
In the triggers 'on activation' line, put this:
action1 = player addaction ["Destroy Radio Transmitter","destroy.sqs"]
Then make a script. Put something like this in it:
player removeaction action1
player playmove "CombatToMedic"
~4
t0 setdamage 1
~3
player playmove "MedicToCombat"
hint "Radio transmitter sabotaged"
~1
"0" ObjStatus "DONE"
exitCall it 'destroy.sqs'
That should work. I'm not sure if the animations are right, I just guessed. That might give you the animation the same as what a medic does when hes treating a wounded guy, it might not
Experiment using this list:
http://www.ofpec.com/editors/resource_view.php?id=471One problem is that the action will stay there if the player leaves the trigger without destroyig the radio. I'm not sure how to stop this offhand, but i'm sure someone else knows.
Good luck