Hey Dan,
Here is something I found:
http://freespace.virgin.net/claire.skaife/rct/home.html This person has several different options that you can download:
1. Every scenario, just moments before receiving the congratulatory message for winning the scenario. Just open and wait a moment.
2. The Blank LL scenario, where you own all of the flat, treeless land, all rides and themes are available, and $10 million at your disposal! (Note: The latest version of the Drexler patch is required for this option.)
I've downloaded the 2nd option, and it works great! The person who did this site also has some excellent resources of tips on completing each scenario, building rides, etc...
If there is one RCT site that I recommend, this is the one!
Let me know how it works for you.
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Neil
Pittsburgh, PA
www.geocities.com/neildeweese