This is just a  small utility for all Non-4Dos users to get the
Extension of a file ... well, it halts with a certain errorlevel for
every Extension supported...
Type GetExt to see the Extenstions...

Add it to your pcbtest.bat... You should know how  to do it :)

Simpe PCBTEST.BAT Example
-----------------
@echo off
:checkextenstion
 GetExt %1
  if errorlevel == 1 goto diz
  if errorlevel == 2 goto diz
  if errorlevel == 3 goto diz
  goto end

:diz
 ZipZap ZipZap.cnf %1 %3

:end