I have recreated Disneyland, California Adventure, and Walt Disney World's Magic Kingdom using RCT 2 and custom scenery. You can see some screenshots of the parks and links for download by going here
http://ohiolandshark.googlepages.com/disneylandrct2 . The files should load up automatically but I added some files that sometimes don't come up with the park. Just take the file it needs (it'll tell you) and add it to you obj data folder. I also have custom music,Fantasyland Music, Pirates and Mansion Music on that site as well, just click the link to download, then add it your data folder. Comments are always welcome!!!