You will need:
1x Phillips Head screw driver
1. Start by removing the left side panel from the chassis.
2. Disconnect the USB ports, Audio ports, and [if applicable] the firewire port from your motherboard.
3. Disconnect the top fan from your motherboard or power supply.
4. Locate and remove the two screws that secure the top panel to the chassis. You will note that one of these screws may have a ground wire attached to it. This ground wire is attached to the front port assembly.
5. Locate and depress the four clips that hold the rear and middle section of the top panel to the chassis. As you depress each clip, lift the panel gently so that the clips remain unsecured. Please be careful at this stage as there are two more clips at the front of the chassis that will be handled in step 6.
6. To release the front clips: grip the top panel as close to the front of the chassis as possible and pull directly upward. You want the force exerted on the top panel to be as close to perpendicular to the chassis as possible. Note: If you still have the power, reset, and LEDs hooked up you should proceed with caution so as not to damage anything.
7. Flip the top panel 180 degrees. Once again note that if you still have the power, reset, and LEDs hooked up, you should proceed with caution so as not to damage anything.
8. Locate the four screws that hold the front port assembly to the top panel and remove them.
9. Pull out the front port assembly. Be careful not to get tangled in the LEDs, power and reset wires.
10. Mount the replacement front port assembly and secure it with the four screws from step 8.
11. Flip the top panel back over.
12. Replace the panel on top of the chassis starting with the front clips and working your way back.
13. Secure the top panel with the screws from step 4. Be sure to attach the ground wire coming off the new front port assembly to one of these screws.
14. Plug in the USB, audio cables, and any front panel connectors (power, reset, LEDs) that you disconnected.
15. Plug the top fan back into your motherboard or power supply.
16. Reattach the left side panel to the chassis.