I'm brand new to these forums--I don't think I'm breaking any rules by posting this here, but if so then I am sure some helpful mod will delete this post.
Just finished the episode and thought others might benefit from a walkthru for use when they get really, really stuck.
Here's the link: http://storygamer.blogspot.com/2007/01/sam-max-episode-3-walkthru-included.html
You can download the walkthru from that site. It's just a bare-bones puzzle-solution that skips all of the fun little side things you can do in the game (did you know there's actually a completely useless inventory item?).
Once again, I hope I'm not breaking any rules. Enjoy the walkthru.