Lets talk about Firewalls
 

I have a linksys wireless router and about 5 pc's hooked up to it.

What is the best firewall that I can get, that will not kill the ram of the pc??

Or how do i put the firewall on the router. Can that be done with a linksys?

Train a monkey to manually close suspicious connections.

If you have a linksys router, the chances are good that it already has a firewall built in. What model is it?

If/when you install Windows SP2 it's going to force feed you the built in Windows Firewall. It's off by default now, it'll be on by default in SP2.

The router is a Wireless G the 54G


And my machines are running ME on the desktops, which are used the most. The laptops both have xp.

you already have a firewall with your router

:thumbsup