I can confirm that unifail works also!
The steps I took :
1 - create unifail USB install up to step 2 of the unifail.com guide. (Note that I did *not* choose the 'laptop' support as we will add that in ourselves with the bootpack.)
http://tonycrapx86.blogspot.co.uk/2011/10/unifail-install-mac-os-x-lion-using.html
2 - replace Extra folder on USB with osxlatitude bootpack. (Note that this folder is hidden by unifail so will need to un-hide it.)
3 - boot to USB and install Mac OS X.
4 - when complete, boot to USB again but choose the internal drive in Chameleon screen.
5 - Run through Lion setup.
6 - when at desktop, install EDP 2.2
7 - run EDP, install Chameleon, then do the EDP build.
Enjoy!