For my money, I thought this was a fun score when it released (I LOOOOVED the "controversy" over "The Kraken" track) and I think it has aged very, very well. It's not as instantly perfect as Zimmer's score for the third Pirates movie (the title escapes me currently) but compared to his unenthused work on the fourth score this music for number two has a lot of bold freshness. Zanelli's unreleased music is great stuff too, it's a shame he can't capture that talent when on his own. A constant problem I have seen all over with Zimmer's co-composers.
I don't believe the specific Rope Bridge part is on Zanelli's website, but I'd have to go back to the film and check.
The rope bridge bit could have been lifted from The Curse of the Black Pearl, maybe... I think it's first heard in Dead Man's Chest, but it could be a bit from The Curse of the Black Pearl which was re-used, possibly.