How do I destroy the Star Generator

Hint 1 of 5:

Go west from the armory, and drop the grenade on the guard.

Hint 2 of 5:

You will soon lose your disguise, so keep your finger on the trigger!

Hint 3 of 5:

Go back down to the Star Generator, and search the fallen guard.

Hint 4 of 5:

Turn off the shield, and walk to the control panel.

Hint 5 of 5:

Key in the destruct code you read back in the mesa from the cartridge.