I use KiXtart 2010 4.63 for a login script. To check in Windows 7 64 bit if file exists in the %windir%\System32 directory I use "SETOPTION("WOW64FileRedirection","OFF")". But when WOW64FileRedirection is set to off the @Comment gives back an empty string. The @Comment I use to map the users department directory.
Additional infos: When SETOPTION("WOW64FileRedirection","OFF") is active for Windows XP clients the @comment get back the right info but Wndows 7 64 bit clients get back an empty string.