I believe I solved the problem to my satisfaction.
While researching, there seem to be some debate on Driver Sweeper and Driver Cleaner Pro. Looks like I used DCP in the past and the instructions I listed above are the ones listed in the readme.txt

Tried DCP but the CCC still wouldn't load. I then loaded ATI Tray Tools and found what I needed: Antialising, Anisotropic Filtering, Mipmap Detail Level, etc, etc.