Hi All, I too was suffering the "Freeze" after about 10 mins of game play, I also have an Audigy card. But I did fix the problem! I used to suffer CTD playing with Falcon 4.0 all the time and this cure worked for it as well.
Go online and find a program call "EnditAll". Do a fresh reboot, run the program, which will remove a lot of background programs, and load up the game. Not only did I remove the Freezing issue I also increased the frame rate!
Try it and let me know.