1) Full (170Mb) install (default destination strongly recommended) the official V1.08.172 US RollerCoaster Tycoon CD "RCTYCOON" [ignore errors and cancel/never register]. do not run game!
Note that this is a copy of the CD structure, and not an ISO file.
2) Install this official V1.08.183 patch "RCT-US" [ignore errors]. do not run game!
3) Full (170Mb) overwrite to the same destination as RCT, the official V1.20.012 US LoopyLandscapes Expansion Pack CD "RCTEXP2" [ignore errors and permanently cancel/never register]. do not run game!
Note that this is a copy of the CD structure, and not an ISO file.
4) Install this official V1.20.013 patch (the Win2k patch) "RCTLL-US".
5) Look inside the LoopyLandscapes CD for the directory "data". You will need copy thirteen files (149Mb) from that directory into the RCT "data" directory on the Hard Drive.
The files are: csg1i.dat, csg2.dat, csg3.dat, csg4.dat, csg5.dat, csg6.dat, csg7.dat, csg8.dat, css17.dat, mp.dat, tutc2.dat, tutk2.dat, and tutl2.dat
6) Next you will need to change the Windows Registry pointer from the CD to the Hard Drive. To do this:
~ Launch LoopyLandscapes.
(Note that in newer versions of Windows you may be prompted to first add the normally not installed feature: DirectPlay.)
After the game fully loads for the first time, imediately Exit the game without continuing further (the reason is so the internal database can initialize itself). From this point forward the game can be restarted and played normally (and you will no longer require the contents of the RCTYCOON and RCTEXP2 compact disks).
7) At this stage it is highly recommended that to prevent Saved Game crashes, you next install this optional ver. Mar 10 2001 Drexler patch "Drexler31001".
Note:
There are fan enhancements that modify Scenario and Track files, and save the superfluous unmodified original files as "old".
Look in your "Scenarios" directory and manually delete any "Old*.SC4" files. Also look in your "Tracks" directory and manually delete any "Old*.T*" files.
Windows 11 users:
The game will be run in "DirectPlay", which will virtualize the game inside a resizable window.
In the RCT Options menu, Screen resolution cannot be changed from "Window". Edge Scrolling will not work in this mode, so untick the checkbox (use arrow keys to scroll).
Screenshots by default will save to the users hidden AppData directory: "AppData\Local\VirtualStore\Program Files (x86)\Hasbro Interactive\RollerCoaster Tycoon".