I bought an airport extreme card in 2006, and haven't tried installing it until this morning (always been hardwired!) Can't seem to figure it out now, as the card seems too small for the slot on my Powerbook G4. Am I missing something??? Also, will I need a specific mac base, or will I be able to configure my mac to reach the dlink base we have in the house for the other pc's? Any help you have on this topic would be greatly appreciated. Thanks!