Archive of the former Yahoo!Groups mailing list: Homebrew PCBs

I know there are many ways to make PCB's, but I am trying to figure
out how to make a auto etcher. The building part is easy. The
problem is where do you get the software and how does it work?
Currently im using old 5 gallon fish tank heater and air stone to
etch boards and is very time comsuming when make larger boards.
Thanks in advance for your time and advice.