This might work for others, it certainly did for me. Ive gone from 25 Frames per sec to 50 by ditching my old fsx.cfg and rebuilding a new one, then tweaking with *******. I already had a ******* tweaked .cfg before the NGX install but the fresh one works even better after. Not sure if this is a coincidence or what would have changed to make things better ??? Have a go and report back as im interested to know if this works for all ;o)