The bwa file is used with BlindWrite. It contains information that is needed to make a working copy.
Alcohol 120% uses similiar format called MDS. You can turn MDS files into BWA files but not visa versa.
Quick Guide for BlindWrite 5.
Put in disc and hit copy button. Put in blank disc and press copy button. Done.
It has a wizard interface so it is basically that simply.
Image wizard. Use SecuROM *NEW profile.
Burning Wizard. Use same profile.
Copying this protection is also dependant upon what CD Burner you have.