I also got a hacked 4GB (2GB) player from Sky_tower,
of ebay.com.au
email sky_tower@126.com,
postal details:
To Wai Ming
Tai Yuen Est
Tai PO NT
Hong Kong

He denied there was any problem,
i told him to send me another 2GB player if he as no real 4GB players (so at least i get a total of 4GB)