Having just reinstalled my Media Center, I had changed the hardware, I decided I needed a way of taking media off the physical DVDs I own and store those movies on the Media Center for easy selection later. I had a look round and decided on Auto Rip n Compress.
It uses third party ripping software such as Vobs for DVDFab or anyDVD
The Green Button has a write up at http://thegreenbutton.com/forums/t/81697.aspx?PageIndex=1
You can download Auto Rip n Compress from the Windows Media Center App Store, and its Free!