Well , i'm still a bit of a newbie myself, i can only get you half the answer you are looking for but lets try :
cp yourdriverfile.tar /usr/src
tar -xvzf yourdriverfile.tar
Now your driver file should be unpacked in it's own directory.
If you are lucky, you will find a configure script there that you can run with either : ./configure or else with sh configure
If you do not get any errors you can then compile it. However i am not skilled enough to guide you through the compiling. (I always forget which one comes first, make, or make install).
Hope the next one that responds can help you with this
Good luck !