Steps 1–3: Keyboard
Step 4: RAM
Steps 5–7: Lower Case
Step 8: Airport Card
Steps 9–12: Hard Drive
Steps 13–16: DVD Drive
Steps 17–19: Modem
Steps 20–25: Logic Board
Steps 26–27: PC Card Cage
Steps 28–38: Display
Step 39: Inverter Board
Step 40: Upper Case
Parts
G4 Titanium Onyx Upper Case
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Tools
T8 Torx Screwdriver
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T6 Torx Screwdriver
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5mm Nut Driver
$4.95 · 124 in stock
Step 7
Your laptop should look approximately like this.
Step 8
—
Airport Card
Skip this step if your computer does not have an Airport card.
Firmly grasp the plastic tab attached to the Airport card and pull up and to the left.
Disconnect the antenna cable from the left side of the Airport card.
Step 9
—
Hard Drive
Disconnect the hard drive ribbon from the logic board using a spudger or the tip of your finger, removing tape as necessary.
I'm not sure what the point is for this step. This helped not at all in getting the drive out. Also, the cable is taped down, and must be untaped before the card will come out.