Read my post here,
http://bbs.hitechcreations.com/smf/Smileys/default/Forum10/HTML/000218.html Using the 5.13 drivers i had major speed loss when using 32 bit after installing 5.22 i can even use 32 bit at 1600 with very little fps drop, also i need to update the other post when i get chance because i was incorrect in my use of memory recall as to the quality of picture with Max FSAA, after viewing the screen shots i took i have to confess that 800x600 with Max FSAA actually does look far better than 1600x1200 res with regard to jaggies, i still think the cockpit dials are clearer at 1600 res tho.
The end result is 800x600 is very playable with Max FSAA with or without 32 bit using the 5.22 drivers.
You just gotta see it to believe it i guess.