Hi,
it is possible to install only the driver. You can extract the driver package and you will find in the folder Packages\Drivers\Display\W76A_INF the msi that will only install the display driver.
If you are looking for a command line based silent install please extract the driver as well and check for the ATISetup.exe in the bin folder. Running ATISetup.exe /? will list all options you have. One is -USE which allows to select a particular package to be installed.