Facter - No operatingsystemmajrelease in my install (CentOS)
Your Facter version is ancient. Consider updating to at least 1.7, but see if you can get 2.1 or above.
Puppet fact, list software Windows
Puppet is about Desired State - not Procedural It feels like you are treating Puppet as procedural at the moment and Puppet is more about the desired state. You determine what is installed, you shouldn't necessarily ask. So on certain server roles you would say the end state is that...