How do you download ATH catwalks in rct3?

you click download and save it. Then when its done open it, then you can extract the files but if you dint want to don't. After that go to computer, local disk program files or program files (x86), Atari, rct3 (RollerCoaster Tycoon 3), style, themed then drag the ATH catwalks file into that, Then your done

Hint- make sure your game isn't running while your doing that. if it is just close it & load it again