How To Install A Package Unit Do I Need A New Head Unit To Install This Sub And Amp Into My 2000 Durango?

Do i need a new head unit to install this sub and amp into my 2000 Durango? - how to install a package unit

http://www.fusiononlinestore.com/12-BASS-PACK-INC-AMP-600W-P12C3.aspx

All I have now installed in the factory and installed the display unit and changing the factory speakers with new speakers installed Kenwood ... I think the purchase of this package of bass and just have everything that I know for the project. I do not know much about car audio knows that ... and if you need a new head unit and I'm looking for?