Squid and WCCP with a Cisco Router

i’ve read a number of posts regarding the topic but haven’t really found what I’m looking for.
I have a Cisco router acting as gateway and i have a squid/dansguardian box filtering web traffic out.
What i want to do is to not have to manually set computers to use the squid. I want to inclued random laptops that connect to our network.

So I figured one of two solutions:

1. use WCCP for communicatin between the router and squid.

2. tell DHCP that the Squid is now the default gateway and use IPTABLES to forward any traffic that isn’t on port 80 to the Cisco Router.

I figure eitehr would work, but I’m not sure how to do eiter one.

Help is appreciated.