ok found a way to do it:
====================
flare.sqs
====================
_flareposx=(getpos truck1) select 0
_flareposy=(getpos truck1) select 1
_flareposz=(getpos truck1) select 2
_flarepos=[_flareposx,_flareposy,_flareposz + 120]
_flare = "FlareRed" CamCreate (_flarepos);
exit;
====================
[] exec "flare.sqs"
====================
cheers, Philly