understanding apt-proxy

[Paul Scott <waterhorse@ultrasw.com>]

I have been trying to use apt-proxy but haven't successful because I 
really don't know how it works.  I have begun to read the 30 page 
apt-proxy script and that may be the best way but I would sure 
appreciate if anyone could either explain it in a few lines or point me 
to a doc that does so.

TIA,

Paul Scott