It seems that a leaked copy of nVidia beta 60.72 drivers has leaked out on Guru3d and a few other sites. I was getting quite slow preformance in FS2004, around 16fps now I'm up to 25 and even 30fps. Not much for a slower system like mine but you never know what higher systems will get. These are with high aircraft, high terrain, low weather, no AA, 4x AS.
Of course, like all leaked drivers, these are highly beta. Try them at your own risk. They worked for me but others may have some problems. The driver inf file supports all know nVidia cards. Some people have reported problems with some games but no major ones.
You can look around for links on the guru3d forums or link directly from here. This is a direct download that does work.
http://www.googlemaster.plus.com/60.72_winxp2k.exe
The drivers will probably be uploaded to the Guru3d library in a few days.