To install Parallels Plesk Panel on a number of servers, you may want to set up a mirror of the official Parallels Plesk Panel update server (http://autoinstall.plesk.com) inside your network so as not to download the distribution files through the Internet each time, and then install Parallels Plesk Panel as described in the Installing Parallels Plesk Panel Remotely on a Number of Servers section.
If you do not want to set up a mirror, you can skip the Setting Up Mirrors section and go on to the Installing Parallels Plesk Panel Remotely on a Number of Servers section.