Zeus can do it. Realistically SCUD is way OP for the small maps that ARMA has, and they had no way of implementing a realistic looking aiming UI. You can fire it up into the sky... simulate a launch, and then ZEUS can STRIKE what you're trying to destroy.

As SJ says, the Scud is essentially an objective piece. Through a combination of the driver stopping the vehicle (speed has to be 0). The commander can raise the missile. The driver can then fire it from his cab. The missile will go straight up. To simulate the missile strike, in Zeus, there is an option under the artillery section (i.e. where you can bring in mortar, artillery and air strikes). Zeus can select that and click on the map. A Scud missile will then fly down and hit that target.

As a non-zeus mission maker, how can I script the SCUD to start in the launched position? Is there a way I can animate it directly in the SCUD's init? Thankyou

Hi Evrik, following your response in general comments I tried animating the SCUD with the actions mentioned: "scud_raise1, scud_raise2, and scud_prepare animation names when it is called via the useraction."

I get an error message in editor mission start, specifying it does not recognize these actions.
This is the code entered in the SCUD's init (Variable Name = SCUD)

SCUD action ["scud_raise1", SCUD];

OK, figured out how to do it, in units init or on trigger (SCUD being the name of the unit):
SCUD animateSource ['Scud_Raise1', 1];

Glad you got it working. Sorry I couldn't have been more help with it.