from the hdd upgrade guide:


  • After formatting the new drive and installing the developer version of the player software onto it, leave it plugged into the primary drive spot.
  • Remove the power from the player.
  • Plug the old drive into the secondary spot (setting master/slave jumpers as necessary if it's a Mark 2 player, or using the second IDE header and second cable if it's a Mark 1).



i don't see what other clarification is needed.