Hi. I'm from DiskTrix and we make a product called UltimateDefrag.
I am a flight simmer of 20 years and I am actually the brainchild behind UltimateDefrag. It was originally created specifically to enable users to get the best performance out of Flight Sim.
Needless to say if this program can improve the performance of Flight Sim X it will also enhance the performance of all other games.
The secret behind the product is the fact that with UltimateDefrag you can specifically place your files for specific games to the outer tracks of your hard drive where performance is 180 to 240% faster than the inner tracks. You can also sort files and folders in specific order.
The manual has a whole background of theory on getting the most performance from a hard drive and UltimateDefrag is based around that theory.
If you look around at some of the flight sim sites you will see that flight simmers are all in agreement that this product works. The difference between UltimateDefrag and run of the mill defraggers is that it is more specifically a file placement optimizer.
There's a 14 day free trial at www.disktrix.com.