How to group audio discs into a category under audio books?

Under Audio Books I already have the grouping of level1 whichs automatically done when i rip the audio cd. But what i want to have is grouping of these discs under another category called program name(level 2). This is to avoid mixing of discs from different programs. How do i do that? Thanks.

Audio Books

Program name      —> Level2

       |

       |

        —> Disc1   ----> Level1

                 |____  Clip1

                 |____  Clip2

                 |____  Clip3

       |

       |

        —> Disc2

                 |____  Clip1

                 |____  Clip2

                 |____  Clip3

Message Edited by j_satheesh on 10-24-2008 10:51 PM

why not just do it as you suggested in a file manager (ie Windows Explorer)?