Seats
 

so yea, has there been any stipulation about changing the seat rails for something a little lower? or maybe the xB seat will fit our car? I really really want to lower my seating postion. it's my biggest pet peeve right now

only issue I see is the jack under the drivers seat, relocate that and you should be able to fit any seat you want into the xD.

so then, who makes the rails?

most companies that make seat make rails as well, they probably just need minor modifications to fit into the xD

Just be aware that there is a seat position sensor for the airbag.