Kevin,

What is your premise for saying, "if Saddam has chemical and biological or nuclear weapons, he'll use them." - Although he threatened to use them the last time, he didn't.

With respect to Iraqi Scud Missiles:
"The Iraqis had four versions: Scud itself (180-km range), longer-range Scud (half warhead weight, extra range attained by burning all propellant immediately rather than steadily through the flight of the missile), Al Hussein (650-km, attained by reducing warhead weight to 250 kg and increasing the fuel load by 15 percent), and Al Abbas (800-km, achieved by reducing warhead weight to 125 kg, with 30 percent more fuel). Al Abbas could be fired only from static launchers; all of the others could be fired from mobile or static sites. Only the original Scud and the minimally modified version were particularly succesful."

The last missiles to be launched at Kuwait were targeted at oil installations 40 kilometers to the South of Kuwait City, which itself is about 150 kilometers from the Iraqi Border. So if fired on the border Al-Samoud 2 might just make it, but when these things were fired, US & UK forces were already 100 kilometers plus into Iraq. 40 & 42 Commando RM already had the Al-Faw Penninsula, one suggested launching position.

The practice of halving warhead weight (possible for chemical or biological payloads), and boosting the range by burning all propellant immediately rather than steadily through the flight of the missile, has one unfortunate side effect - the missile is liable to go unstable during flight and break-up - that proved to be the case on quite a number of occasions during the Gulf war of 1991.