Read this, http://en.wikipedia.org/wiki/Ping,
will explain what "ping" is and why you can't just install some software to make it less.
Aside from having the ISP check your settings, you modem and router, connection type, all will have some effect on ping. You can also check for different servers to connect to that are closer to you or at least have a better ping time. Note that in the internet world, physical proximity does not always equal a shorter ping time.