Instructions
Open your Web browser and navigate to MegaUpload.com. Search for "Mattatt14Mattatt14's Space Mountain" then click "Download."
Extract the file by right-clicking it and select "Extract to Desktop."
Open "My Computer," "My Documents," then "Program Files." Double-click on the file named "Atari."
Click on "RollerCoaster Tycoon," then "Style" and "Theme."
Drag the Space Mountain file into the "Theme" folder.
Open "RollerCoaster Tycoon 3" and navigate to build mode. You will now have all items needed to build a Space Mountain-theme roller coaster.