Right so, we need to work out what big winner, little winner, speaking and july all mean. They're the only clues left that we're yet to solve.
We officially worked out through Steam that hubbletelescope was the galaxy clue, and that the

smilie must have been the original plan for the code because because "Voldemort, it's of his middle name" leads us to that. So all we need now is the last password, and the two apparently really tough smilie codes.
EDIT:

<-- Credits to Karyete on this one. That was brilliant.
EDIT 2: ONE CODE LEFT GUYS! ONE SMILIE! 5320604Twentieth and July together make Billy Mays' birthday. Surely this has something to do with it?