@galen84basc-- It's not very hard at all, and you really don't need any special equipment to get a basic, decent tasting root beer.
All you need is an empty two liter bottle, a supply of cold water (tap water is fine), then some white sugar, baker's yeast, and rootbeer extract, which you can get online or in grocery stores. Oh, and a funnel.
So you take your two liter and put in a cup of table sugar (you can do slightly more or less to get the kind of taste you like). Then add in 1/4 teaspoon of yeast. It should be powdered yeast, not liquid yeast.
Shake the bottle up to distribute the yeast evenly throughout the sugar -- this is important, so make sure you shake thoroughly!
After you've got it mixed up properly, shake the bottle so a little dip forms in the middle of your sugar and yeast mix -- you want to make a bowl to catch the rootbeer extract.
Next, you add a tablespoon of rootbeer extract, which will get sticky on top of the sugar.
Fill your bottle about halfway full with cool water, and then swirl everything around until it dissolves. Then proceed to fill the bottle up to the neck, and put the cap on the bottle.
You should let it sit for about three days at room temperature, and then you can refrigerate it before you drink it.
So no rootbeer kegs required -- unless you want them -- just a two liter and some extract.
Best of luck!