如何为XBox创建自定义DVD播放器？

I would like to create an application that runs on XBox 360 (downloaded using XBox Live) that will play the DVD movie in the tray. I know the XBox already has this ability, but I want my custom DVD player to allow users to save bookmarks for parts of the movie they really like and then browse their bookmarks later when they put the DVD back in. It might sound silly, but it is for a business venture I am undertaking.I would like to create an application that runs