This still could be improved - DeckMetaData's constructor loads an MTGDeck object to parse out the name of a deck from its file. This means that we crack open 106 files on the first attempt to show the list of opponent decks. I started optimizing this, but reverted, as the list itself is sorted alphabetically. Currently, with these mods, it's still taking 4 1/2 seconds on my psp to load the opponent list on the first go around.
While at it, did some cleanup - removed the need for passing around a player pointer in some of the DeckStat functions, etc.