Im unsure if this will work but usually when u set an AI's behaviour to stealth they lay down.. Maybe u could switch the behaviour from Stealth to Aware then back to Stealth?..
would look like this:
p1 setbehaviour "STEALTH"
p2 setbehaviour "STEALTH"
p3 setbehaviour "STEALTH"
~2
p1 setbehaviour "AWARE"
~2
p1 setbehaviour "STEALTH"
~2
p2 setbehaviour "AWARE"
~2
p2 setbehaviour "STEALTH"
~2
p3 setbehaviour "AWARE"
~2
p3 setbehaviour "STEALTH"
~2
Not sure if this would work better or worse or at all :-\