Maple + vista Home premium

Hopefully not off-topic, but can someone tell me if and how (settings) Maple
(on-line game) can be used/played on a standard Vista account.
So far it seems only an adminstrator account would do.
Under XP-pro I was able, with some minor adjustments, to achive this without
endangering the safety of the PC (full rights PC account for a son of 13 is
asking for trouble :-)).

gtx

RoB

btw. the gameguard or nprotect (anti-hacking add's) of this game can really
screw-up your pc and/or make it funerable on-line even just when not playing
the game..... (or mess up two programs at the same time).