lower case please :) no need to shout.
there is a thread here somewhere, i dont have time to do the looking for you
but....
1, lift up the front of the rear seat and remove.
2, unbolt the rear seat 4 bolts near the seat belt mount points
3, lift rear portion or rear seat straight up (may require a little force)
4, gently remove from car and place aside.
5, gently prize the side trims fro either side of the shelf (optional)
6, gently prize the shelf off the rear deck watch for wires
to reasemble use the above list backwards.
update your profile to show where you are, there may be a local club member who can show you first hand
i have photo's all sorted ......now just got to find the motovation to put a how-to together
**edit**
http://z4.invisionfree.com/lexusaltezzaclu...?showtopic=5199stolen from the other thread you placed a "shout" out in (thanks E910)