If you have not tried the man-page on tar, I would suggest it, just so you get use to where to look for options. TAR is very easy to use, and most distributions are setup so when you "extract" the files, sub-directories and files are created in a sub-tree from your current location in the file system.
I like to install things I download into "/usr/local/src/....." Usually I create a directory just for the download and do the extraction there. It's cleaner that way.
Move your tar-file to where you want the new sub-tree to be created. Some tar-files are compressed, either with a "gz" or a "bz" extension after the ".tar". What you want to do is extract all the files. The format of the tar command is as follows:
tar -xvzf my-tar-file (for a ".gz" compressed )
tar -xvjf my-tar-file (for a ".bz" compressed)
tar -xvf my-tar-file if no compression was used
x - extract
v - verbose (show me files as you extract them)
f - use the following file as the input source
You should find a "README" file in the new directory created from the tar-file and maybe more instructions on how to make/install your driver.