You don't need someone elses squid.conf to set it up. You have two options.
1. Open /etc/squid/squid.conf in emacs or VI, and follow the instructions in it. You only have to change two or three settings to get it up and running. Or...
2. If you don't like text editing, get webmin. It has a great browser based frontend to easily configure squid as well as most other services. It's at http://www.webmin.com
post your conf file after you get set up and we'll look at optimizing it..