A while back a thread was posted that revealed a reghack for mapping drives with a GPO Script and UAC on, was not supported by Microsoft.
http://www.kixtart.org/forums/ubbthreads.php?ubb=showflat&Main=26719&Number=197754

The reghack required changing EnableLinkedConnections - http://www.kixtart.org/forums/ubbthreads.php?ubb=showflat&Main=26424&Number=195765

Since these threads I've been wanting to revisit this. I remembered another post that discussed running your mapped drives via a vbscript called launchapp.wsf.
http://www.kixtart.org/forums/ubbthreads.php?ubb=showflat&Board=1&Number=192303

After looking over the script, I decided I would try to convert it for kix purposes. I had to add the ablility to accept arguments and a little error testing. It appears to run for me on my computer, but none of my clients use a GPO Script.

I was wondering if someone with a GPO Script could test it and post back their results. The point of the the function is to map drives and printers in the context of the user with the UAC on (Vista, Win7) while running in a GPO script. Just create a simple mapdrives.kix file to go along with this. 

if instr(@producttype,"Vista") or instr(@producttype,"Windows 7")
  $RC=RunAsInteractiveUser(@scriptdir + "\kix32.exe", @scriptdir + "\mapdrives.kix")
  ? @serror
endif
 

 

Function RunAsInteractiveUser($FQFN, optional $arguments, optional $workdir, optional $taskname, optional $donotdelete)
  Dim $service, $rootfolder, $taskdefinition, $triggers,$trigger,$action, $settings
  Dim $TriggerTypeRegistration, $ActionTypeExectuable,$flagtaskcreate,$logontypeinteractive
  if $taskname=""
    $taskname = "Run As Interactive User - " + @ticks
  endif
  $TriggerTypeRegistration = 7
  $ActionTypeExecutable = 0
  $FlagTaskCreate = 2
  $LogonTypeInteractive = 3
  if exist($fqfn)
    $service=CreateObject("Schedule.Service")
    $service.Connect()
    $rootFolder=$service.GetFolder("\")
    $rootFolder.DeleteTask($taskname, 0)
    $taskDefinition = $service.NewTask(0)
    $triggers = $taskDefinition.Triggers
    $trigger = $triggers.Create($TriggerTypeRegistration)
    $settings=$taskDefinition.Settings
    $settings.DisallowStartIfOnBatteries = not 1
    $settings.StopIfGoingOnBatteries = not 1
    $Action = $taskDefinition.Actions.Create($ActionTypeExecutable)
    $Action.Path = $fqfn
    if exist($arguments)
      $Action.Arguments = '"' + $arguments + '"'
    else
      exit 2
    endif
    if exist($workdir)
      $action.WorkingDirectory = $workdir
    else
      exit 2
    endIf
    $rc=$rootFolder.RegisterTaskDefinition($taskname, $taskDefinition, $FlagTaskCreate,,, $LogonTypeInteractive)
    if not $donotdelete
      sleep 1
      $rootFolder.DeleteTask($taskname, 0)
    endif
  else
    exit 2
  endif
endfunction