Thanks for your help! I've tried both of them and none seem to work. About the link to the US marketplace, I'm not from there, so the market is closed for me. I can only use my country's marketplace.
The code is correct and there should be no trouble getting the game, but it just doesn't seem to happen. It keeps on telling me that the code is invalid.
"Lucky 13 X" (the M) told here that:
"The process is not designed for that including scenarios that
involve the 120 gig hard drive, memory units or Arcade/Elite consoles
as these items never came with a copy of Hexic HD."
Well my console is an Elite, and it brought Hexic HD in the 120gb hard drive. Perhaps thats why the code doesn't work, don't know...
But again thanks for your help!