Welcome to MS4W, the no fuss installer for setting up MapServer on Microsoft Windows platforms. The purpose of this package is to allow all levels of MapServer users to quickly install a working environment for MapServer development on Windows. It is also an environment for packaging and distributing MapServer applications.-Welcome to MS4W. the no fuss installer for setting up MapServer o n Microsoft Windows platforms. The purpose of t his package is to allow all levels of MapServer u Sers to quickly install a working environment f or MapServer development on Windows. It is also an environment for packaging and distributing MapServer applications.