I assume that you mean other than using the 2X speed setting in the menu:
From a thread by Bearcat....
[glow=yellow,2,300]"I think you're referring to that old trick of increasing the exe's system priority for more performance. It was SDC who first shared this. You have to create a new shortcut for the cfs2.exe, right-click it and open Properties. It has a shortcut tab where you'll find a target box. Copy and paste this in the box:
%comspec% /C "start /HIGH cfs2.exe"[/glow]
Keep your old shorty in case you decide not to use this one. Personally, i've never gained much from using it. And it has the added effect of fracking with any other third-party CFS2-related software running in the background, like Active Sky or FSMetar for weather, or screenshot (Mgrab, Hypersnap, IrfanView) or movie-making programs ala Fraps. It cuts them out of the CPU processing loop for your CFS2 session. You'll have to also raise their system priorities before you load the sim to get them to work effortlessly with the high-priority sim engine."
