First take a normal Link - Im Making This As An Example is All :
http://www.megaupload.com/?d=56UF508PX
Next Add mgr_dl.php after the / It will look like this
Http://www.megaupload.com/mgr_dl.php?d=56UF508PX
Now when u do this U should go to a free screen or just a Download Now screen with the full speed of a Premium Account :DThen Let's Try and tell me.... :P