You have to track down the guy who stole the painting, and find out where it is. There are clues in the surveillance video at the museum security office. You will have to get the timecard from the museum security guard (he is in the Clown Store). When you have the photo of the thief, show it to the people Downtown.
There are no snowballs on Counterfeit Island. (see the related question)
The international art thief called the Black Widow is out to steal the painting The Scream, and is aided by her henchmen and guards.
You have to get a balloon.
you have to take the underground tour
You hide behind the furniture.
you go behind the furniture and statues
If on Counterfeit Island, hide behind the plants and statues.
You go to the scream and hang above it
look up the walkthrough on youtube its so easy.
Counterfeit IslandNo, Counterfeit Island is real. In fact, it'd be better named as "Art Island".
you cant its part of the island mission
there is no mansion on counterfeit island