JesusThanks for the Tweaking utility. It seems to work on my system, although most of the changes consisted of moving the sliders to the left. One always hopes to get more than the PC can deliver...One entry that has me puzzled is "Optimal A/C shadow settings have been applied". In the tweaked cfg file, "Aircraft casts shadow on itself" was turned on. I had it off as I was under the impression this would cause an increased load on the system and reduce fps. Can you clarify pleaseRegardsJohn