Display.cfg

I was wondering if anyone knows what specific driver settings for radeon cards in display.cfg mean. In particular Disable=x. I've found that by transfering these specific parameters under the line in fs9.cfg where my display device is indicated (something like: Display.Device.RADEON 9800 PRO.0) I can influence the sim's behaviour; in particular I partially got rid of stuttering, even though I'm still fiddling with the settings in a "trial and error" manner. Some settings seem to have values ranging from 0 to 2. It would probably be useful to gain more knowledge on what these parameters do, because I have a feeling it might be a good road to follow in order to solve some of the many issues that afflict this potentially excellent simulator. I myself have more than a decent rig, and have been so far pretty unsatisfied with how the sim runs. Just wanted to share some thoughts. Happy if anyone wants to bear with me.luca