if i'm using wpi with the %systemdrive% variable, instalation goes perfectly.but if i want to use it later, from cd only, it won't work... i tried : cmdow @ /HID @echo off FOR %%d IN (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 %%d\CD.TXT SET CDROM=%%d SET KEY=HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnceEx REG ADD %KEY% /V TITLE /D "Installing Applications" /f REG ADD %KEY%\001 /VE /D "Preparing Installation..." /f REG ADD %KEY%\001 /V 1 /D "%CDROM%\install\wpi\WPI.hta" /f if the cdrom it s not the first cddrive in my pc, wont' work could anyone explain the cmdline to use with diskpath='root' ??? tried: cmd1[pn]=['\\Install\\install\\winrar\\setup.exe -s'] cmd1[pn]=['root','\\Install\\install\\winrar\\setup.exe -s'] cmd1[pn]=['%root%\\Install\\install\\winrar\\setup.exe -s'] cmd1[pn]=['','\\Install\\install\\winrar\\setup.exe -s'] not working 10x