the mazda mp3 was a third gen mazda protege,limited edition,looks a bit like the msp,but without turbo,it has sport suspension,4 wheels disc brakes,sound system from kenwwod,a bit different ecu,150hp instead of 130hp,some littles differences...for the mechanic,its the same car,except for some suspension parts,like the links,i am not sure about that,but i know that the mp3 came with a back sway bar wich is different from the one on the es...
most of parts fits on your car,if i remember right,the big diffence is the mazdaspeed protege suspension,but again i am not sure,probably someone could confirm the differences...