To involved to explain here if you have never done brakes before,get a Haynes manual and follow that,I've done dozens over the years and once you get the gist of it you find most are the same anyway,if your u/s at mechanical things leave well alone and go to a garage,these times are making people try things they know nothing about(fair doos)but don't risk it if your unsure.
Oldhand, March 2010