1. I would start remove back seat first to allow me remove both seats easy later. So I removed the beach seat (sit on). No tool need since it is snap on.
2. I removed 2 nuts (bottom of back seat) that hold back seat (sit back) and pull up that it has 4 tabs from rear metal. You won't need nuts anymore.
3. I removed 2 plastic cover on bottom of front pass. seat.
4. I removed 2 bolts on bottom of rear pass seat.
5. Remove pass. seat belt that connect from car
6. Take pass. seat out
7. Repeat same step (3, 4, 5, and 6) as for driver seat but just remove wire for power seat and selt belt (warning light). Since I have cloth seat. You might have more wire for heat seat if you own leather seat.
8. Take driver seat out. (mostly easy way to take both front seats out in rear door because I have big room.
9. I removed metal bracket that support old back seat. It is 5 bolts. Keep that because you will need them for new seat.
10. I install back seat (sit back). I use 5 bolts as step 9
11. I install pass front seat. I use 2 bolts that I removed from step 4
12. same step 11 for driver seat too
13. I put back seat (sit on) to let metal clip go into hole of car frame.
14. make wire connect from 04+ leather seat to the car.
That's pretty much for writeup.
There is picture of writeup. Pretty old thread from last year.
http://www.gpona.com/forums/04-leather-seats-on-97-03-model-review-56k-t8965s50.html