If you use the starter motor method, dont forget to unlock the flywheel first !!
I got mine off with the starter motor method, with 10 minutes of blow torch action before hand. Takes a bit of setting up though, i.e anticipating which way the bar will try and turn, and making sure when it does so, you havent chosen the position where it whips round and smashes your wheel arch.
if you look through the drivers wheel arch, the normal engine rotation is clockwise. therfore "if" you put a bar and socket on the crank and turn the starter motor, it will try and turn the bar clockwise. so, bar pointing towards the front of the car, against the floor seems the obvious choice.
you dont have to hard wire the starter, just make sure the car is supported well, make sure bar and wrench is in place, then get in the car and flick the igntion as if your trying to start the car.