...I'm having trouble finding things, and I don't know where people are. The game runs in a kind of real-time, and it's difficult to tell if important people have yet to arrive or if I've missed them.

I think I have to restart because I hid Tyler's body under the bed without informing the conductor that I don't want my room inspected. I had just finished the dinner scene, about 2 minutes before the conductor checks my room. Is there any way around this or should I restart?

http://www.the-spoiler.com/ADVENTURE/Smoking.car.productions/last.express.2/

THis might help.

You don't need to talk to the conductor (I didn't even know that was possible in my run-through of the game).

If you can get to your room before he does, you might have enough time to toss Tyler's body out the window. If you can't get to your room in time, don't worry - just click on the jewel to the left of the clock (in the pause menu) to rewind time as much as you like.

I love the fact this is in real time. Just makes the whole adventure genre feel more authentic and engrossing.

I restarted the game with a new walkthrough and I got much farther. This game is definitely worth the $6

If I remember correctly (it's been ages since I last played the game) it is also possible to tell him you don't need him to turn down the bed from inside the room. If I remember right he will knock on the door and a speech bubble should appear giving Cath the option to say he doesn't his bed turned down.