If you must, then I'd suggest starting off with a network sniffer like
Ethereal (it has a new name now, I think), and then doing a trace of all
the requests that your browser performs. That will give you an idea of
how much work is involved, from the number of requests that actually go
out on the wire. Then you can start digging into each of the requests,
and see if you can automate them using some scripting tool.
I would personally highly recommend ngrep and firefox's plugin
livehttpheaders to trace the requests.
curl is your friend then.
Cheers
Gildas