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Installing an Airport card is highly recommended and luckily, it is relatively painless process. Installing hardware in a PowerBook is still not for the faint of heart, if you are uncomfortable opening a PowerBook we recommend that you have it installed by the dealer you purchase it from.
Read more: Titanium: Installing an Airport card.
If you are also planning to upgrade your hard drive, it is a good idea to do it at the same time while the bottom cover is off. Visit our Titanium: Installing a Hard Drive for complete step-by-step photos and instructions.