hey zach, i actually just did this for the first time (using the openrct2 launcher) and am glad to walk ya thru it. first you have to have RCT2 for openrct2 to work. linking RCT2 is done by clicking "options" and locating your "rct2 location". once that is done click okay, then play. once you're in the game is when you connect RCT:D or RCT. click "options" in the top right. then the last menu, the wrench with the screw, at the bottom of that menu is "path to rct1 installation", locate that. then you'll see there's some red text saying basically that you have to restart openrct2 for the changes to go into effect. so exit openrct2 and reopen it and rct1 should be working for ya! it's not really rct1 though, just the scenarios hope this helps!
