Oooh.. Here I thought you wanted easier AI, my bad.
You have a choice either go fiddle in the AI-Sensor.dat or the Sim.cfg file.
For the .dat file you'll need a tool called Silent 3ditor which can be found here:
http://www.subsim.com/radioroom/showthread.php?t=219029 (Scroll down and you'll find it).
As per Sniper297 instructions these values need to be changed:
http://www.subsim.com/radioroom/show...&postcount=112
http://www.subsim.com/radioroom/show...&postcount=113
If you're going to alter the Sim.cfg file (which is easiest) open it with notepad or similar tool and as per neilbryne instructions change these values.
http://www.subsim.com/radioroom/show...&postcount=143
Comparing files can be difficult and tedious but someone made a tool for that too.. its called Winmerge and can be found here:
www.winmerge.org
What it does is quite simple, once a file is opened this tool compares them and show you where the differences are, depending on which file you wan to use change the value of the other. It even makes a copy of the original file for you