I have installed one on my own truck and helped with the installation of one on TDR member Tazzen's truck recently. The Jacobs/Mopar kit comes with very clear instructions. Overall the installation should take you and a buddy between 3-4 hours to complete without rushing. You could do it yourself, but it wouldn't hurt to have an extra set of hands there for a couple of the steps.
BTW, there is no additional vacuum source or belt to contend with on an '02. The vacuum to operate the system is taken from the current vacuum line that is located on the drivers side rear of the engine. The vacuum line and the wiring harness is contained within one bundle. You simply disconnect the current vacuum line at the specified connector, insert a "y" included in the kit, and then connect the vacuum line for the unit.
If you have any specific questions about the installation or the unit itself, let me know.
Justin