Customize Your Dock

1 First download Leopard Docks App (works with 10.6 too)

2 Download a custom dock from here

3 Open Leopard docks

4 Click browse and locate the Dock folder that you downloaded (step 2)

5 Click change my dock!

To reverse click the original dock radio button

Note: I not responsible for the content of the links as I am not the site admin of Leopard Docks.