I saw a post some days ago when you've asked for the GetLocalPlayer thing with quests.
And I use this solution:
I create the quest in GUI,
(GUI): Quest - Disable(/Hide) (Last created quest)
(Custom Script): GetLocalPlayer -
then (GUI): Quest - Enable(/Show) (Last created quest)
and then (Custom Script): endif
tada
you obv. allready found this out didn't ya?