I actually did read it... I think you've misunderstood my question. I don't want Windows XP setup to copy the files stored in $OEM/$1 to my C: drive, so I put them somewhere else on the cd... In RunOnceEx.cmd I should point to these files, but instead of using the system root variable (the files are only on the cd !), I should use something like %CDDRIVE%, only the right command. Don't get upset and so, I've already made a WORKING unattended cd...