Now that you've rested, it's time to finish the job. Continue to the south. You may lose a friend on the way, but it'll be of no real consequence. Head to the lab and meet Jeff's father. He'll give you the Sky Runner. Get inside and fly it to Threed!
Once you "land", help Ness and Paula escape. Fight the Boogey Tent in the southern part of town and then give the zombies a taste of fatal attraction with some Zombie Paper.
Now save your game and call it a day.