Open your file or type directly into the console.
This fools the game's startup check into seeing the "D:" drive as a valid CD source. A Modern Alternative: CorsixTH Theme Hospital Dosbox No Cd Crack
If you have all the game files in a folder but no ISO, the game is looking for the CD path in its configuration file. Find the file in your Theme Hospital folder. Open it with Notepad. Look for the line starting with INSTALL_PATH= and CD_PATH= . Open your file or type directly into the console