Ubuntu :: How To Change Show Desktop Icon

I hate the purple "Show Desktop Icon" in Lucid and I finally figured out how to change it:
1) sudo apt-get install wmctrl
2) Create the following script and proceed as directed within the script's comments:
#!/bin/sh
# GLD's Show Desktop Button script. Here's how to do it.
# sudo apt-get install wmctrl
# Right click on the panel and select "Add To Panel".
# Choose "Custom Application Launcher".
# Use the file name of this script for the Command.
# Use whatever icon that you want. The generic Ubuntu Show_Desktop_Button icon is located here:
# /usr/share/gnome/help/user-guide/C/figures/show_desktop_button.png

if [ -f /tmp/toggle_show_desktop_$USER ]thenwmctrl -k off
rm /tmp/toggle_show_desktop_$USER elsewmctrl -k on
touch /tmp/toggle_show_desktop_$USERfi