Instead of downloading the whole of Chain Reaction, it might be worth you downloading the Dog Soldiers scenario. It's designed as an intro to the CR/2HW mechanics, and all you need to play is 5 figures to represent the squaddies, 5 to represent the werewolves, a plan of the house and the shed, some trees and a vehicle to represent the Landrover. It should give you an idea of whether the mechanics are suited to you.