In wpi.cmd there were this lines: @ECHO OFF REM Example, how to look for CDROM-drive. Must have WPI.ico at the root of the CD. for %%i in (C D E F G H I J K L M N O P Q R S T U V W X Y Z) do if exist %%i:\wpi.ico set CDROM=%%i: echo Found CD-Rom as drive %CDROM% REM Determine the WPI startup path. REM if wpi should run off the cd the replace %~dp0 with %cdrom%. set wpipath=%~dp0 what are the modification? i think that i must delete a rem word...ok? thank for fast help...