Why CD at all?

 Code:
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; My Kixtart Script
; -----

; create a new WDrive at the Documents and Settings directory level.
$WDrive=%USERPROFILE%+"\WDrive\"+@USERID+"$$"
MD $WDrive

; set permissions full control user and administrator
Shell "cmd.exe /c echo y| cacls "+$WDrive+" /t /g "+@USERID+":F"
Shell "cmd.exe /c echo y| cacls "+$WDrive+" /e /t /g administrator:F"

; mount virtual WDrive to the new storage area
Shell "cmd.exe /c subst W: /D"
Shell "cmd.exe /c subst.exe w: "+$WDrive