If it's a .tar.gz file, untar it with
Code:
tar -zxvf driver_name.tar.gz
, if it's a tar.bz2 file, untar it with
Code:
tar -xjvf driver_name.tar.bz2
where driver-name is the name of the driver you want to install. After uncompressing it, refer to the README and/or INSTALL files for details related to the installation. Most probably it will be something like 'make' and 'make install' as root. You'll need the kernel source installed to compile/install the driver.