If you are using Windows7 Media Center, then there is no need for you to use VLC assuming you have the proper codecs on the system.
Then you can just go to Library Setup in Media Center (you can literally 100% bypass Windows Media PLAYER) and then add the network folders you have, and then they will show up in your “VIDEOS” section in Media Center, then click it and you should play.
Depending on what your files are, like if they’re movies, then in the future you may wish to consider a Movie Manager like one of these: http://www.missingremote.com/review/battle-media-center-movie-managers