wizofoz

you can totally do it; my buddy had an mba in finance too, so here's what he did; he registered for all three exams concurrently, and got 70+, all sections, all levels;
on the exam day, he started at his lvl 1 desk, wrote it in an hour, then sprinted over to his desk in the level 2 section, did that in an hour, and sprinted over to the level 3 section, and did that in an hour. Then he just repeated this for the afternoon session.
He said it wasn't too bad, but kinda rough since he was pretty hung over from the night before. He said he flipped through a few of the pages leading up to the exam, but it was mostly a recap, so it wasn't too bad.

Good luck!