There are two ways. You could take I-4 all the way to 192 but that would be the heavy traffic way, specially if you do it around rush hour.
You could also take the Greenway (417) to the Osceola Parkway exit. Take a right at the end of the offramp, take a left at the lights (you will see Gaylord Palms...the left brings you onto South International Drive). At the next set of lights, you are on 192. However, be aware that the Greenway is a toll road..I think it cost about $5 in tolls, maybe more.