Collect the 6 torn pieces of the Dragon Face (2 at the docks, 1 atop the museum, 1 on the inn, 1 in the underground by the light bulb, 1 in the supply closet when you get the museum job).
When you leave the museum after getting the last piece, it is night time. Go to the underground exit at the docks, enter the underground, climb the ladder, and use the Dragon Face picture to make 6 changes to the Dragon Face lock, so that you can enter the Museum through the closet.
During the Tour, you can recover the torn picture piece. At night, you use the pieces to open the lock and enter the museum from below.
You use it.
Once you get the key from the curator, go back to Counterfeit island and use it at the Inspector's house.
You use the key from the Curator to unlock the Inspector's house in the CountrySide.
You don't ever even use the boat.
Go back to Counterfeit Island and use it to open the Inspector's house in the Country Side. On the way, the street artist gives you a clue as to what to look for in the house.
When you get past the Black Widow's guards, then you will use it to enter her layer. Have fun! :-)
a girl named paisley
The island was released for free general use on January 4, 2010.
Having checked, she is neither in the jail on Counterfeit Island nor in the County Prison on Super Power Island. There does not seem to be any other facility for her in Poptropica (unless they decide to use the dungeon on Astro Knights Island).
The same way you got in to get the picture piece : use your key.
You take it back to counterfeit Island and use it on the door of the house.