I bought the game (RCT2) and both expansions at the same time... i loved it!
But now....i reinstalled it on a vista (i had it on anXP) and the game works fine but the expansions are....welll they don't work..... on the main menu in the top left corner under the logo i see
Wacky Worlds! and Time Twister! (yay!they work![me thinking it]) so i went to the scenario menu and all scenarios are there in fact and when i click them they get loaded and at the end of loading
strange error message whit some numbers and words i don't remember.... (note:this happens whit all esxpansion scenarios) oh and in the coaster editor the expansion attractions aren't there 
PS: I alredy played them on the windowsXP so i'm sure they alredy work.....
But now....i reinstalled it on a vista (i had it on anXP) and the game works fine but the expansions are....welll they don't work..... on the main menu in the top left corner under the logo i see
Wacky Worlds! and Time Twister! (yay!they work![me thinking it]) so i went to the scenario menu and all scenarios are there in fact and when i click them they get loaded and at the end of loading
strange error message whit some numbers and words i don't remember.... (note:this happens whit all esxpansion scenarios) oh and in the coaster editor the expansion attractions aren't there PS: I alredy played them on the windowsXP so i'm sure they alredy work.....