The CEP calculator is designed to be used with Ballis-tec 6.0 or later versions. Both are free from http://www.sdk-weber.com (click into 
the LadyHawke shoppe). 

Once it is installed, you can launch it from Ballis-tec by clicking Tools-- CEP

CEP uses Ballis-tec group files (*.grp) for its calculations.
