I found the Bentley pretty much useless if you want to go deeper into the engine than replacing spark plugs. Project 101 has a write-up on replacing the pads and solenoids, also available online for free, you can look it up yourself.
Useful links:
Project NUTROD
http://986forum.com/forums/show-tell-gallery/73917-blue-boxster-resurrection-project-8.html
Good luck!