Here are some rough directions:
From Orlando airport, take the North exit, then take the BeeLine Freeway (I think it's the 528)west toward Disney/SeaWorld. (There are two tolls, one $.50, and one $.75.) Exit just before I-4 at International Drive. Turn Right. The Rosen Center and Rosen Plaza Hotels will be on the left, just past the huge Orlando Civic Center. (There are two hotels, right next to each other).