老地方冰果室交流區

我一直誤以為已經內建，直到今天買了 Air Port Express 才發現找不到 hardware (經 AirPort Setup Assistant 和 System Profile)。請問：

1)前世代 PowerBook G4 1G 15" (鋁) 是否已內建 AirPort Card? 我查了一下現在 1.33-1.5 的 每一台 PB 都號稱有AirPort Extreme。這是怎麼回事？難到是上一世代的是 build to order?

Bluetooth. Wi-Fi. Ethernet. When it comes to communicating, the PowerBook G4 covers all the bases, offering state-of-the-art solutions right out of the box, including built-in Bluetooth, built-in AirPort Extreme, and built-in high-speed Ethernet. On every PowerBook model.
http://www.apple.com/powerbook/wireless.html

2) 如果自行買 AirPort Extreme 卡，會否很難裝？我看 PowerBook 似乎除了 RAM 和電池，沒有什麼可以拆的。這又何解？