Royal Croaker Mystery Mystery Cache

Nostromo, a commercial towing-vehicle en route to Earth towing several million tons of mineral ore, carries a crew of seven and a computer the crew calls "Mother", which monitors the ship's operations. At the start of the film, Mother receives an apparently unidentifiable signal from a nearby planet and wakes the crew to investigate. The tug portion of the Nostromo lands on the planet (with the ore and mining facilities left in orbit) and Dallas, Kane and Lambert leave the ship to investigate the signal. They soon discover a derelict spacecraft of unknown origin. The group enters the craft, finding the pilot's (see Space Jockey) dessicated remains. Kane descends into a chamber beneath the pilot, discovering thousands of leathery eggs. One of the eggs opens, the lifeform inside leaps out, breaks through the visor of Kane's spacesuit, and attaches itself to his face. Dallas and Lambert carry the unconscious Kane back to the Nostromo. Ripley, the commanding officer in Dallas's absence, refuses to let them back onboard, citing quarantine protocol. However, Ash disregards Ripley's decision and lets them in.
http://en.wikipedia.org/wiki/Alien_(film)

It was rumored the Aliens were wiped out.

However, there were other Alien cells, remaining hidden - until now!

A spy stole a coded document relating the last Alien's whereabouts, and hid it.

Recently that document (containing the encoded transmission) surfaced during the excavation for yet another strip mall. The importance of knowing the location of the last Alien should give you a sense of urgency for your quest to find the truth about what really happened to the crew of the Nostromo and to take revenge on the last of those Alien creatures.

As it turns out, ink as found in our common everyday ink pens will destroy the Alien cells. It is most unfortunate the Nostromo crew were unaware of this bit of Alien trivia.
A copy of the encoded transmission is below. Your mission is to decode the transmission, obtain the coordinates, visit that location, and destroy the last remaining Alien cells by noting your accomplishment therein…