MI4:
Guybrush awakes floating in the sea on a roller coaster cart. He lands on Dinky Island, which is now populated. After accidentally sinking the island, Guybrush escapes but almost drowns a few miles away. He's saved by a ship full of beuatiful women, but accidentally sinks that too.
After a long four CD adventure, Guybrush winds up being shot by Elaine, and after medical attention from Wally, he uncovers a complex and evil plot being devised by the nuclear mutated LeChuck and his new cohort, Pinky. Guybrush accidentally causes LeChuck's fortress to sink. Wally perishes, and Guybrush is transported to the moon, where Elaine shoots him again.
MI5:
Guybrush awakes floating in the sea on a bumper car. He lands on Rollo Island and, bored, starts a laminating business. After one week he closes it and starts searching for Elaine. He finds her on Turkey Island, and they fall in love again.
Uber-LeChuck captures Wally and Guybrush, then locks them up in his dungeon below his new resteraunt. Guybrush escapes by using Wally's corpse as a decoy and embarks on five CD adventure and ends up underwater with no land in sight. He floats to the surface on a huge whale and discovers a fabled island called Zini Island with a huge treasure called Chaching he read about. As he's about to dig it up LeChuck runs him over with a lawnmower and sends him to a carnival place.
MI6:
Guybrush awakes floating in the sea in a small beach bucket. He lands on Coma island and magically goes into the future with Stan's aid. He embarks on a short one-CD adventure through time searching for Elaine and Zini Island. He finds Elaine on Zini Island, who now hates him again. Guybrush is about to dig up the treasure when LeChuck kicks him in the groin, stuffs him in a box, and ships him to a publishing company. Guybrush dreams he marries Elaine and lives happily ever after... Until he wakes up and is hit over the head by a cute dog named Pinky.
And now, I'll be working on MI7... See ya.