Hi Craig, thanks for the reply.
No, I haven't tried anything like that yet. As soon as I have a spare couple of hours I'm going to sit down and go through some of the tweaks recommended on this forum. Slightly concerned as it seems to be about the lowest score I've seen for a system of that spec. & MOH gets a bit choppy when the action hots up - I've seen posts from yourself & others saying it should fly through MOH no problem. Maybe the nvidia needs a little revving up to compete with the ati.
It's been back to Alienware once already for an in-game crashing problem which they resolved by swapping just about everything - gpu, motherboard, hard drive...