Okay, First: The thing you enter is this:
@echo off
cd /d "\Crysis\Bin32"
start /high Crysis.exe

Make sure that they are arranged like this in 3 lines, as shown above. Also, the /high is where you can enter the priority. For example, I could also put /realtime if I wanted even more performance, with more system instability. All options are /normal, /abovenormal, /belownormal, /low, /high, or /realtime.

Note: Doing this method increases performance from the game. I use it on all my games for a about a 5-15 FPS increase. Also know that with a low perfoming system, this can cause system instability. Use with caution.

EDIT**** MANY PEOPLE HAVE BEEN ASKING ME THIS: "When I click 'game.bat' it opens notepad. WTF?"
Here's what to do: Open My Computer, then click Tools, Folder Options, and in the "View" tab, find "Hide File Extensions for Known File-types" and uncheck it. Then go to your .bat file, then rename it from "Gamename.txt.bat" to "gamename.bat".

ONE MORE THING:
If you are too dumb to know what the "File Path" is, then read about it here:
this is a tutorial for the people that have old pc and lags alot on Combat:
Features
*High Quality
*High Perfomnace
*High frame

How to
1.)Put the Andy.bat on C:/Nexon/Combat Arms/ folders
2.)Right click on Andy.bat and click send to-> then click Desktop
3.)after that Just open Andy.bat shurtcut and it will not lagg not even with 16/16 people on a server join
and
Thanks me