You either find some guru to work on it as any web forum can't help as the details get too deep too fast.

Or you start over. Dell has many of the OSes for download such as http://forums.cnet.com/7726-13974_102-5325452.html?tag=posts;msg5325452 so it's never an issue you are missing the DVDs today.

In fact, I wonder if this is the usual discussion about PC backup. It's never been optional.
Bob