Gus, check the archieves, lots of discussion on 5 vs. 6 with the recommendation being 6 for SRT's
Stealth, the mounting points Jon referenced are for both the lap belt and front belts. You can store the belts in the car. I take out the harness belts as it effects seat travel and they come out very easily, you can tuck the lap belts between the seats. On the front diaper, loosen the straps all the way, then slide the belts over the front corners of the seat.