You can create your own environment variable using [ExtraFileEdits] and the RyanVM Integrator I made one for my Vista Sidebar AddOn http://www.wincert.net/forum/index.php?showtopic=485 Edit your i386\HIVEDEF.INF file... Look for HKCU,"Environment","TMP",0x00020000,"%TEMP_DIR%" and just add something under it like HKCU,"Environment","VAIO",0x00020000,"%SYSTEMDRIVE%\VAIO" NOTE: this will not take effect untill you LogIn for the first time so you cant make a inf addon with the variable you just created... You can also make a INF addon to add your var. The Brown is the name of your Variable and the Green is the Path to the folder You also might want to add a semicolon and your enviroment var name between Percentage symbols like ;%VAIO% to i386\HIVESYS.INF HKLM,"SYSTEM\CurrentControlSet\Control\Session Manager\Environment","Path",0x00020002,"%SystemRoot%\system32;%SystemRoot%;%SystemRoot%\System32\Wbem;%VAIO%"