Dell PP04S Owner's Manual page 54

Press the device latch release so that the latch release pops out.
3
Pull the device by the latch release to remove the device from the D/Bay.
4
Insert the new device into the bay, push the device until it clicks, and push the device
5
latch release in so that it is flush with the bay.
Windows XP automatically recognizes the new device.
If necessary, enter your password to unlock your drive.
6
54 U s i n g t h e D e l l ™ D / B ay