i bought a clone off ebay, a 4GB. its real 4GB. super fast even with 3.3GB on it. its awesome.
the guy i bought it from made a manual for the player. its amazing. this will help you:
What Is A Hacked Player:
http://www.teekobeach.com/whatisahackedplayer.html
How To Check The Memory of Your Player:
http://www.teekobeach.com/howtocheckthememory.html