I will use the following AutoIT-Script (of course without hard coded paths):

#include 'Permissions.au3'
_InitiatePermissionResources()
Local $File = 'C:\ACLTest'
Local $aPerm[3][3]
$aPerm[0][0] = @UserName
$aPerm[0][1] = 1
$aPerm[0][2] = $GENERIC_ALL
$aPerm[1][0] = 'Administrators'
$aPerm[1][1] = 1
$aPerm[1][2] = $GENERIC_ALL
$aPerm[2][0] = 'System'
$aPerm[2][1] = 1
$aPerm[2][2] = $GENERIC_ALL
Local $ret = _SetObjectPermissions($File,$aPerm,$SE_FILE_OBJECT ,'',1,1,3)
_ClosePermissionResources()

Markus Zander