Basically, I need to create a Media Drive Using my Airport Extreme Base station and my WD My Book External Hard Drive. Ive plugged the Ext. HD into the Base Station, but Non of the Windows Computers in My house can pick it up, But my I mac Works fine with it. I need This so I can Stream Media from the Ext. HD to XBMC, Without having Any Computers on. Any help would be much appreciated, Thanks!