its quite simple process and i did my one myself.
4 bolts on the old oil housing then there is one directly above which you cant see and can only feel for - you need to keep the 4 on to undo the top. and I think its a different size from the 4 bolts.
i used ozmazda's how to on a sp23 but can't seem to find it again (haven't really looked) only difference is we have the bolt on top for our oil cooler.
try these guides
http://www.torontomazda3.ca/forum/sh...rsion-Pro-tips - but has no pics
http://www.mazdaspeedforums.org/foru...te-how-118433/ - seems more complicated than it is but has pics