It's really very easy, no tools required. Pride has a video of how to do it at:
http://www.youtube.com/watch?v=artAQJn1x6E
Basically, the seat, basket, and battery just lift off. There is a latch that separates the base into two pieces. You turn a knob to loosen the tiller so you can fold it down, then tighten again so you can use the tiller to help lift it into the trunk. It only takes a few minutes.
ETA: Actually, with an SUV, you may not even need to take the frame apart. Just lift off the seat, basket, and battery, then fold down the tiller and put the whole frame in. It's not heavy. I can load my Pride Go-Go into the trunk of a Hyundai by myself.