Stuck in The Long Trip

[Michael Beck]

I've managed to get the bus moving, get the shoes, and have gotten the padlock key from the bum.  But I'm stuck.  How do I find floor numbers for the elevator, or else what do I do in the tent?

[Michael Beck]

I figured out that I should type in 999 and -999 for floor numbers, and have gotten the ship model and blown up the sign.  I've also opened up the lamp and gotten the power flowing.  But beyond that I don't know what to do.