No, it was WAY more detailed that than. Let me search and see if I can find it...

Edit: This one: Actual, complete, ridiculously thorough third row swap completed. (Pic heavy)

Re-reading it again it looks like he swapped his entire interior over to the two-row. The first few posts and such deal with installing 3rd row seats into the car. drill some holes, creating mounts for the seatbelts, etc.

The rest (the tabs and such I was referring to) turns out are related to swapping his second-row seats from fold-down style that 3rd row cars have to the lay-flat style that two-row cars have.

So not as involved for just adding the 3rd row, but still need to be very comfortable spending money and doing things right.

I think 3rd row cars also have curtain airbags but i could be wrong