ADW Launcher EX Tutorial for changing docks and icons:
Step 1: Click the option button on your phone and bring up the menu on the bottom. Navigate to ADW Settings.
Step 2: Go to “UI Settings”
Step 3: Go to “Main Dock”
Step 4: Select “Dock Background”
Step 5: Select “Custom”
Step 6: Select “Gallery”
Step 7: Select the dock you want to use.
Step 8: Go back to your home screen. Make sure you drag the icons from the app drawer on to the dock itself.
Step 9: Long-press the newly placed icon on your dock until this pop-up shows up. Then select “edit” so you can make the icon blank.
Step 10: Select the picture of the icon you are changing.
Step 11:Select “Picture”
Step 12:Select “Gallery”
Step 13: Select the blank icon. Make sure you know where it is. You can download this icon here: Blank PNG
Step 14: Hit “OK”.
Step 15: Now your icon is blank and you will be able to see the custom dock’s icon.
Step 16: Rinse and repeat and you are finished!