After you have met the system requirements, You can install it from the TarBall or you can get it directly from CVS.
Installing from a TarBall is very easy. The files should be installed in the webserver directory. So all you need to do is unpack the tar ball and copy the whole directory to the webserver directory (eg. /home/httpd/html for default apache configuration in many linux distros).You may have to get required permissions to do this. Contact your system administrator if you dont have the permission to write to your webserver directory