Alright guys. I just registered to post you my solution. I had the exact same problems. And i tried everything. the 11.6 driver solution was OKish, but way too low fps and looked like crap. With the 11.10 Driver i had the smoothest game, but artifacts all over the place. I did everything posted here, but nothing worked really good ...and then i had it right

Im running it on a E8400 dual core with ATI HD6000er on win7 64.
It looks perfect now, and constantly high fps without any stuttering.
I′ll give you a rough idea what you have to do:
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-Uninstall your current ATI Driver in windows - software
-Use Driver Cleaner to delete any relics of the driver
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-Download the official 11.9 driver from AMD. This is IMPORTANT. This is the only driver who worked fine for me with my config.
-Now, restart and install the 11.9 driver --> restart.
-open the catalyst graphic options and put everything to "use application settings" / triple buffer off/ Force VSync ON / (blabla i think thats not the important part)
-Go to C:\Users\USERNAME\AppData\Local\ATI\ACE/
Profiles.xml and EDIT. Search for "Catalyst" and you find one entry for the catalyst AI. Change it the "enable" to
"Disable"Now RESTART again.
When windows is up again, you go to the Task manager and Shut down "CCC.exe" and "MOM.exe".
Now you any config for rage which is around, its all nice and stuff.
Run the game and enjoy your sunday

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Key element is: MOM.EXE and CCC.exe seems to be responsible for the 100% CPU Usage on the rage exe. and the 11.9 driver is the only one which worked for me (without AI). The rest is like all the other guys already said and explained. You can use whatever rageconfig or commands on your rage.exe.
I needed 3 days to get to this result, and i want to thank everyone who posted here, it helped me alot because i used every idea from a lot of threads and finally it worked for me

I hope this fixes it for some more guys here.
Greetings!