You are in luck, i just figured this out myself. Open the scenario editor, when that is fully loaded, go to the load option on the interface then load your park. You can only load parks that are in the new scenario folder, but you can move any of your saved parks to this folder before you start. Aft...

Good luck with this, i have been trying to re-create AIR for months for my AT Re-Creation but there just isnt the coaster pieces in the flying coaster to re-create it accurately.