No way. I'm running the same chip with 1.5 gig pc3200 and a x800 xl and I couldn't get medium-high.
My dad's new Conroe Core 2 Duo e6400 with 2 gig DDR2 800 and a X950 Pro runs it at high, but at 30 fps..
I use a joystick with a variable throttle, 30 bucks for the Logitech Xtreme 3D.. deifnitely worht the buy a few years back. Pain to use F4 all the time in FS X.
And yea, mexican.. collisions are configurable..