I've been playing this game on and off for a week or two now and have
enjoyed it immensely but I've reached a spot where I have to shoot a
guard. This involves moving a cross hair over him but I'm dead before
I can do anything.
I've been stuck here for two days and it's driving me nuts.
Is there a secret to getting past this bit? A certain part of the body
you have to place the cross hairs over? And I assume it *is* LMB to
shoot? (Haven't managed to squeeze a shot off yet)

Cheers,
Robert

If I don't remember wrong, there's complete "walkthrough" to game on CD... But don't read the rest of it, just the bit where you're stuck at

I had a look at the walkthrough - told me that part was difficult,
which I already know.