what he said^^.
the fuel filter is a piddly little thing from factory. get the z32 one - its almost twice the diameter = better flow. check the DIY/FAQ section. there is a tute on how to do this.
the seat is really easy to get off. unscrew the 2 bolts holding the bottom part of the seat down, shove a large spanner, screwdriver or anything with leverage capabilities under the seat, as close to the bolt position as poss and pull up. the seat backs are just held by 2 screws at the bottom end and then just lift up and off their hooks.
for the AAC valve refer to DIY section again