How do you download rct3 coaster cars

This may be a little confusing. To do this you download the CTR. In the folder there should be something like cart and track. What you do is you bring the carts/cars to program files, atari, roller coaster tycoon, cars, coaster carts(this is copy/cut and paste). For the tracks, you bring it to program files atari, etc. Then bring it to tracks then tracked rides. Some sites to find them are rctdb.com (i think .com)