I beat it! Saw the last cutscene and everything. I died intentionally while fighting the Baron the first time, so that I could fight the other guys again (except the bosses) and earn more experience to finish maxing out my party's stats. It was fun to beat many of the bad guys with just bare hands. The rest I killed with a sword, a chainsaw, a couple of rifles, and a golden Desert Eagle. Man, that was fun. Between yesterday and today, I must've been playing the game for at least 6 hours, which is a long time for an SC game. Excellent work Eqwanox!
One criticism: I forgot that I was working for Nick, so I didn't realize that I was supposed to go back to the Shamrock after killing the bosses. That should be more obvious.