im not sure cause i haven't installed mine yet and i didnt look on the box but i think that you install wild then after that take wild out and put the original rct-3 disc in and run it off of that but im not sure i know soaked is like that but you can always download rct3 and use a cd crack code and burn it if you know how i hope this helped[:D]
it probably will be the same as soaked. That you'll need to install with the wild cd and then run with the original cd. But what do you mean with "I seem to have misplaced mine..."? Did you lost the cd? Did you broke it? Also if you didn't had the rct3 cd. How ever could you play soaked then? Or don't you even have soaked then!?