Its quite easy mate, you got an aftermarket headunit? you need a power cable and in line fuse, earth cable, remote cable, and RCA leads. bascially the power cable goes straight from the battery to the amp, remote cable from the back of the headunit to the amp and so does the rca leads. and earth the amp behind the back seats on the beam at the bottom just undo one of the bolts.
hopes his helps and sorry if ive got anything wrong.