audio video stereo speakers

i have a 2000 explorer xls with and aftermarket head unit, I picked up one of the 4door factory jbl amp and sub combo from the junk yard today, i dont know much about audio and subs, etc... but im pretty handy, what all do i need to do to get it to work?

*UPDATED* This is whats left. Everythings taking up space in my garage, so prices are pretty cheap. Mass Air Flow Sensor - $20 Throttle Body - $20 Front License Plate Holder - $5 Newer Style Pass Side Exhaust Manifold (Dorman 674-329) - $30 Lamp-Out Module (These are HARD to find!!) - $20 All 4...