Worlds of Hurt: Expert

I know that talking about the original BioShock is "so two years ago", but screw it, I'm still hooked on it. The last trophies are up in the air for me, and all I have to do now is beat this hellacious level in under 15:00, which nigh impossible. That is my goal for the weekend, since the weather is precluding any fun activities.

BTW: Today I beat the game on Survivor Difficulty w/o using Vita-Chambers. If you've never played BioShock before, this will all seem so confusing as to render it basically foreign. For that, I apologize...