I'll find you a couple of links. It seems like a ton of equipment that you need, but it's really not that much. A couple of things that are crucial- a brewpot big enough to boil about 6.5 gallons and a big enough burner for that is the main one. The second would be a way to "make" the extract- what is called a mash tun (or MLT for mash lauter tun). That's often a jerry-rigged item, like a big igloo cooler with a false bottom. The last crucial item I can think of is a way to chill the wort- usually an immersion chiller. You can chill a small volume (like in your Brewer's Best kit) in an ice bath, but that doesn't work very well for 5 gallons of boiling wort. You want to chill the wort very quickly, to get a good "cold break" as well as prevent some off-flavors.