Imatation
I am having trouble understanding your problem. If you rip a DVD to your hard drive and import that folder into Media Center MC will point to the VIDEO_TS.IFO file (I think). If the DVD is authored such that it starts with the DVD menu then the DVD menu will start when you select the file. (You can confirm this yourself by inserting a DVD into your disc drive, manually navigating to the VIDEO_TS folder on the disc, select VIDEO_TS.IFO and open it with MC.)
Media Center has no problems with DVDs and there is no need to mount them on a virtual drive.
However, I suspect your problem is with blu ray discs. MC cannot open blu ray menus. I understand there are some licensing issues. While any open source media player will open a DVD menu only the "premium" players (like that piece of crap PowerDVD) can deal with blu ray menus.
There is a solution. You can rip the blu ray with MakeMKV (
http://www.makemkv.com/download/) and then convert the separate chapters to mp4 files with Handbrake (
http://handbrake.fr/downloads.php). If you rename the mp4 files to the track numbers and chapter names you can place all the chapter files into an "album" in MC and you can play it that way. That's what I ended up doing with my concert blu ray discs.