traci, the 2 hour time limitation may be a problem for you. Even if you could magically transport yourself to Epcot in the blink of an eye, you're probably not going to be able to walk on to Test Track, Mission Space, or Soarin'. The standby lines can be over an hour long in the afternoon ( except maybe M:S which tends to be less than the other popular rides ) and fast pass return times, unless you get them in the morning, will be for much later later in the day. Single rider lines might shave some time off of that, but it will still be hard to hit those 3 rides within 2 hours. You might want to decide which one is the most important and do that one first and then see how much time is left.
You can always hope for the best, but by the time you get to Epcot, walk to your first attraction, wait in line, and finally ride, your 2 hours will probably have expired.
Good luck though! Have a great trip!