I'm studying lists from the Genki I book, and I just want to study, say, all the Vocab and kanji from chapters 1-6. Seems really simple, but I can't figure out how to do it. Any help appreciated.

On the textbook's list page, click the "Change Study Settings" on the left, then edit "Skip Sections" so that you just have 1-6 in there. Also, if you want to make sure you get all the kanji instead of just the kanji the book wants you to learn to write, make sure you have All Kanji in Lists on in your account study settings: http://www.skritter.com/account/settings-study

Cool, thanks for the reply. Skritter seems very comprehensive but I'm kind of battling it trying to get specific study lists out of it, I'm wishing I had a bit more control but still overall happy with it so far.

When I go to skip sections, there's a part above that that says "add vocab from section" and I can only select one section at a time. Will this still quiz me from all that I select in skip sections or only one section at a time, starting with the "add vocab from" section?

It'll start at that section and gradually add the rest of the words from there to My Words. If you have already added them before, it'll realize that soon and they'll all be in there quickly, and then you'll be quizzed on those six sections together whenever you study that list.