Just to add little more detail to Pam's post above....
We always do the south exit to 417. Go through 2 tollbooths ($1 each), get off at exit 6, International Drive. Go straight, that takes you to 536 (Epcot Center Drive). After you pass through the Disney Arch, get off at the next exit, Downtown Disney. Go straight at the light, OKW will be on the right about 1/4 mile down on Bonnet Creek Parkway.
Or, a slight variation on the above directions:
Take the third exit after the Disney Arch, go straight thru the traffic light onto community drive and to the OKW entrance.
If you're in a hurry to get 'home', it's two less stop lights.