If the captain's drunk, it musta been a hell of an overnight! Why are you down in the lobby? You should have called in sick hours ago!
Rules? What rules? Ehhhh- rules were meant to be broken!
Descending through DH? No problem! Just make sure that you're on glide and localizer, and the aircraft is at least 2 degrees nose up. When the radar altimeter calls 50' bring the thrust levers to idle and brace yourself for impact. Heck... if some of those bigger new fangled airplanes with computers can do it, there's no reason that a human can't do it too!
(Seriously- read this thread:
http://www.airlinepilotforums.com/showthread.php?t=7546. Much of what you want to know is in there)