Well, just an update of what I've uncovered;
I was initially excited about what I learned in this thread, with that updated version. Turns out that doesn't work, for the reasons stated above (support was nuked.)
Where install hangs up (copy of install log):
Check if system has the tools required for installation.
fglrx installation requires that the system have kernel headers. /lib/modules/3.8.0-23-generic/build/include/linux/version.h cannot be found on this system.
One or more tools required for installation cannot be found on the system. Install the required tools before installing the fglrx driver.
Optionally, run the installer with --force option to install without the tools.
Forcing install will disable AMD hardware acceleration and may make your system unstable. Not recommended.
So I tried a suggestion I found that said to;
sudo apt-get install linux-headers-generic
but that didn't change a thing.
Since I've been at work today, I've come across this suggestion
. Will be trying it when I get home. It seems to get to the root of the real problem (downgrading the x-server) but I'm still unsure where Mint 15 falls in with the Quantal vs Raring instructions. Will have to clarify that.