I loved Psychonauts! I had it for the Xbox. Rumor has it that the PS2 port was kind of on the buggy side. I got stuck on that same thing when I played it, by the way. And you have to listen carefully to all the things that are being said, beause I swear I heard "That woman has very large breasts" at one point.
I never finished the game, the meat circus level defeated me, but otherwise, I really loved it.