Making soda is actually really easy and I'm kinda surprised I haven't gotten around to it yet but other things have just taken priority I guess. I got some extract from Gina's mom for this past x-mas and bought the additional gear needed recently and went to it.
This is basically all you need
The additional stuff I needed was another bottling bucket, the extract is so strong that basically whatever it touches becomes 'root beer for life' so you can't use a bottling bucket that you intend to also use for beer again. I also needed plastic bottles. Due to the high amounts of sugar the natural carbonation process happens faster and can carbonate much more than beer usually does and glass bottles have a tendency to 'fail' spectacularly if you don't keep a close eye on them. Plastic has more give and it also gives you a tactile way to know when carbonation is done...when the bottles harden up. Also needed some dry champagne yeast for the natural carbonation. Not sure what that does to flavor but I was told by the local homebrew store manager that the extract is strong enough to cover any residual flavors. And judging by its smell I think we should be fine.
Gina loves her some root beer
The actual process is a snap. Warm water, extract, sugar, yeast all go in the bucket. Stir it up to mix/dissolve. And then bottle it. That's it. Makes 4 gallons and took us maybe 30mins. Needs to 'ferment' / carbonate at room temperature for 3-4 days then to a slightly cooler basement type locale for another 3-4 or so and then to the fridge and then your stomach, with maybe another week in the basement to refine the flavors a bit before drinking if you want.
And yes, I know that its not Draft because its in bottles but I don't care. I'm running this show.