Brake job questions

[Coffinhunter]

I've searched the forum and taken in a lot of advice. Now I just have a few questions that I have not seen anything about.

1) When replacing the pads, do I have to replace the sensors too? They look like pretty flimsy wires in the pictures, but I don't know.

2) Advanced Auto parts has a vacuum type system for the brake lines/fluid. They will let me use it for free (a deposit in case I don't return it). Has anyone used it?

3) Since this is the first time I will be doing the brakes on the Boxster (and I am paranoid about this car, lol), is there a good "guide" for the job, including bleeding the brakes? Be it a post here, or youtube, or whatever.