The Pirates 1 End Credits sounds fine, but there's something distinctively off with Dead Man's Chest. Like it was artificially up-pitched or sped up. As an alternative, I'd like to offer another version - a recording I'd done a while back, which also includes the entirety of the "Hello Beastie" track:
Dead Man's Chest - Hello Beastie & End Credits:
http://forums.ffshrine.org/showpost.php?p=977007&postcount=23
I also did up a recording of At World's End, too, which, not to tout my own horn, but I think the transition to the Hoist The Colours arrangement turned out a bit smoother in mine. Also included the epilogue coda, which has one final excerpt of the Love Theme:
At World's End - Drink Up Me Hearties & End Credits:
http://forums.ffshrine.org/showpost.php?p=971232&postcount=19