If you don't know how to do it (or don't have the right tools), it'll take all weekend. It took me 3 hours to do the first caliper (I only did the rears), and about 20 minutes to do the second one. Just to let you know, these times were to replace the pads only.
yea i have the right tools or tools that will work and i am not sure i i need calipers yeat. the backs are real bad i will do them first if i have time tonight to do the front.
(just got a nice paycheck figure to spend it on the z)