Seeing how these drivers are only really intended to fix Doom 3 and they are still Betas, there is no reason to install them for your whole OS - you only need it for Doom 3. Download the 4.9s from here.
Extract the file "atioglxx.dl_" from the "Driver\2KXP_INF\B_17036" directory inside the setup file. You can use WinRAR to do this, or just extract the files to the standard "C:\ATI\SUPPORT" directory via the setup file, but DO NOT install anything.
Open up command prompt by clicking on Start>Run and then typing CMD. Type in "EXPAND" and then drag the "atioglxx.dl_" file into the command prompt window so that it's exact location is after the EXPAND command. Finally add a space and type "C:\Program Files\Doom 3\atioglxx.dll" or whatever your Doom 3 installation directory is. You should have something that looks like:
EXPAND "C:\Documents and Settins\Local Settings\Andrew\Desktop\atioglxx.dl_" "C:\Program Files\Doom 3\atioglxx.dll"
It is important you use the quotes if your directories or filenames have spaces in them. Now simply press Enter and you should have expanded the Catalyst 4.9 driver to your Doom 3 root directory. Doom 3 will now use the 4.9 OpenGL driver and you shouldn't have conflicts with any other games.
Extract the file "atioglxx.dl_" from the "Driver\2KXP_INF\B_17036" directory inside the setup file. You can use WinRAR to do this, or just extract the files to the standard "C:\ATI\SUPPORT" directory via the setup file, but DO NOT install anything.
Open up command prompt by clicking on Start>Run and then typing CMD. Type in "EXPAND" and then drag the "atioglxx.dl_" file into the command prompt window so that it's exact location is after the EXPAND command. Finally add a space and type "C:\Program Files\Doom 3\atioglxx.dll" or whatever your Doom 3 installation directory is. You should have something that looks like:
EXPAND "C:\Documents and Settins\Local Settings\Andrew\Desktop\atioglxx.dl_" "C:\Program Files\Doom 3\atioglxx.dll"
It is important you use the quotes if your directories or filenames have spaces in them. Now simply press Enter and you should have expanded the Catalyst 4.9 driver to your Doom 3 root directory. Doom 3 will now use the 4.9 OpenGL driver and you shouldn't have conflicts with any other games.