The procedure is the same for any DNA catalyst application.
1. open the program and agree to install the driver
2. DNA program will extract necessary files (INCLUDING atioglxx.dll) into a folder (of your choice) before installing.
3. A message will come up asking you to confirm if you want to remove your current driver. (I use this time to copy the atioglxx.dll from the folder). There are a few atioglxx's there, so take the one from a folder named "normal OGL" (or something of that name).
4. Once that is done, disagree to install the driver. Regardless of whether you agree or disagree to remove your current Catalyst, it gets removed anyway. So I installed Ati Catalyst 5.3 again.