Sorry about jumping in a little late in the game..

You are missing $userwinkey and $machinewinkey.
Code:

 $userwinkey='HKCU\Software\Microsoft\Windows'
 $machinewinkey='HKLM\Software\Microsoft\Windows'


Add this above -
Code:

IF @inwin=1
$profilelocation=$userwinkey+' NT\CurrentVersion\Windows Messaging Subsystem\Profiles'
$windir=READVALUE($machinewinkey+' NT\CurrentVersion','SystemRoot')
ENDIF


HTH,

Kent
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