Detecting Flash Player or plugin on stand alone systems

I have been tasked to download and apply the latest flash player (to be in compliance with Operational Directives for patching vunerabilities) to our stand alone systems which are not connected to the internet.  These systems cannot be connected to the network because of existing contract agreements between our organization and the contractor.  I was able to download the latest version of flash player/plugin for these stand alone computers.  Our office is not interested in installing Flash player to computers that do not have flash already pre-installed, just the ones that have old versions that need to be patched.  My problem is everything I have researched involves solutions that require access to a webpage/internet to verify if Flash has been installed.  Is there another method to verify if Flash Player or the plugin are on these computers without being connected to a network/internet?  We are also not permitted to install any 3rd party software that is not approved for use within our organization. Any suggstions will be appreciated.  All the the computers are 32bit OS - Windows XP SP3 or Windows Server 2003.