The first thing you'll want to do is copy the mods folder into your BF2's mods directory, this will place the demo files in the appropriate places. Next the video config utility allows you to adjust the video settings, from using the Overall Quality switch to custom settings like the Terrain, Geometry and Lighting. Once that is done click the Generate button, that will modify the video.con file in your profile.

Adjusting the screen resolution is a bit more difficult since we have to edit the Guru3D.bat file. Right click on the batch file and select Edit that will open up notepad. From there enter the settings you want in the +width and +height sections (ie +width 1024 + height 768) but make sure the settings keep the 4:3 contrast ratio otherwise the benchmark will fail. Once you've selected the settings you want, save and exit. Note, you will have to repeat this process every time you want to change resolutions.

Once the above is done, double click the Guru3D.bat file and let the game fly. You can tell when the demo has ended when the Assault character no longer moves, once you've reached that point, Alt-Tab out of Battlefield 2. That should get you to the Benchmark Information window where you can get the appropriate information (avg fps, min, max, etc).

We here at PCStats do five runs because the results vary quite a bit from each individual run. We disregard the high and low values and average the other three. Now you know how we get those Battlefield 2 numbers even though there is no benchmark utility built into the game. ;-)