Musicmatch Jukebox And Itunes Conflict

I need an answer to a strange situation. I use i-tunes exclusively for for all functions, including burning. I was previously a user of Musicmatch Jukebox Plus, which became bug infested. I discontinued it and switched to i-tunes (now using most recent version) Problem: when I uninstall MMJB from my PC, Windows Explorer no longer shows my CD drives and i-tunes "Cannot Find CD Burning Device" When I reinstall MMJB, the drives return and i-tunes recognizes the drivers and is able to function. I guess I can live with this scenario, but would like to understand why MMJB takes my computer resources with it upon uninstalling and why i-tunes is unable to access these resources without MMJB being present.

Dell Windows XP Pro itunes v7.2.0.34 CD Driver 2.0.6.1 DLL 2.0.6.2