calipers, where the handbrake cable goes in

So it's time to get the hands dirty... open up the good old
Haynes manual, and it says "Take in to a specialist", well
that sounds like BS to me, this manual must have been
written in the states.
Has anyone got anything relating to this job? or know of
something on the net? The brake kit can be bought anywhere,
and I've only ever done drum barkes before, so I'm slightly
wary of how the hand brake interacts etc and any traps for
young players... ie: springs that come out and never go back
in.
Cheers
Gazza
"PO1SON"