-( Story related, cannot be missed )-
Reunited with Clank, you head to Nefarious' space station to meet with Quark. Proceeding with his plan, you will eventually come to the control station for the laser. I am not certain if you have to destroy the numerous station facilities with the laser, but you do at least have to clear the asteroid field to signal the Armada. Once all of the boulders are gone, summon Lawrence and have him call the ships in. Return to the console and the Terachnoid will attempt to stop you from using it again. Command him to move and use the laser to heat up one of the saucers, and you'll start a chain reaction.