You just call CRO (1-407-WDISNEY) and give them the code BEX... that is the ap discount. Then when you arrive to check-in you must show one valid ap (annual pass). Good Luck!
Here are the rates:
WDW Annual Passholders can ask for Code BEX and get special discounted rates at select Walt Disney World resorts for check-ins 2/17/05-4/16/05. These discounts are supposedly available only for Sunday-Thursday check-ins, but some people report getting the rates for Friday and Saturday check-ins. Some sample rates:
Value Resorts (All Stars and Pop Century) - $74 standard
Moderate Resorts - $104 standard
Wilderness Lodge - $156 standard, $170 woods view
Animal Kingdom Lodge - $199 savannah view
Contemporary - $199 garden wing standard view, $317 tower
Beach Club/Boardwalk/Yacht Club - $271 garden view
Polynesian - $287 garden view
Other resorts, room types and views are available at varying prices!