Where do I get the spare improbability drive

Hint 1 of 6:

Get drive from the engine room. (Who are you going to believe?)

Hint 2 of 6:

Be insistent.

Hint 3 of 6:

DON'T PANIC!

Hint 4 of 6:

Go aft, say YES, YES, AFT, and NO you don't want to stop.

Hint 5 of 6:

LOOK, and then LOOK again (I warned you this game lies!).

Hint 6 of 6:

Pick up the spare improbability drive (AKA generator).