BB Ive got vitualy the same lap as yours but with a 400 Pentium. In CFS youll get a slowdown in graphics when they become more complex: like smoke and flame from a Heinkel in your face over London. Its the London graphics that slows it down as I get no probs when blasting the buggers over the Channel.
BTW Ive got a Saitek USB too. My trouble is after every new computer bootup I have to go through the bloody hoops retesting the stick because CFS "forgets" its there!