(If there are any problems getting the installation to work, please contact us.)

*note* 10/02 - Chameleon nightly is still working. I just added a tempory way to make the install MUCH easier.
After you install Chameleon Nightly XPI below, all you need to do now is launch this install file to complete installation.
Do this:

./mozilla -chrome chrome://theme_builder/content/install.xul Win:
mozilla.exe -chrome chrome://theme_builder/content/install.xul Mac:
I'm not sure yet . . .

You will be prompted to finish the install w/ this dialog.
You need only do this one time.