from the root folder of the SD card
private > wii > app > rsbe > pf > stage > melee is where the stages are
it's usually easy to tell which stage is which. I don't think you can unfreeze Castle Siege without modifying the codes folder.
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GT: peril1337
I bet sakurai will beg final fantasy to put Cloud in the game. -CloudXSoldier talking about Brawl