There is a program called DVDAfterEdit that gives you a lot of ways to look at the build of a disc, It also gives you the ablility to make changes to the disc. Overall a great tool. The problem with any program like that is you have to do a lot of learning to use it right. So if you want something that has an inspect button on it that is not for you. If you want to trace down what is doing on it is extremely powerful. But it is not cheap either.