I didn't use jockey so I didn't have a previous version of fglrx installed, and I didn't do any manual changes to any files.
I just downloaded the 12.6 installer from AMD, installed the build dependencies which if I remember correctly are execstack, dh-modaliases, debhelper, devscripts and build-essential, used the installer to build ubuntu packages which I installed with dpkg -i and finally I ran apt-get install -f to fix the dependencies before rebooting.
Sleep/resume works now but compiz crashed once and I have the annoying "unsupported hardware" watermark.
You can get my package here btw:
Use at your own risk of course!