how do I go about installing the following file PCI_56K_V2_K2.2.16.tar.gz
Thanks, in advance.

if you have a .tar.gz file use the following command:

user]$ tar xzvf <filename>.tar.gz

The parameters are x to extract files, z to filter through gzip for decompression (leave this off if the file does not have a "gz" extension), v for verbose mode so you can tell what's going on, f indicating there will be a filename to follow.

This will not normally install the software, you can then read the README or INSTALL file for installation instructions.

cheers:)

Thanks version2, it solved the issue.