Well, I work at a print shop and I do this once in a while... Unfortunately, I don't think Quark has an easy way of doing this. There are plugins like Quite Imposing, but they cost money.
Do you have your page size set as finished (folded) size or as run (spread) size? If it's set for finished size, what I usually do is, in the Page Layout (F10) window I move each page in order 1-x from top to bottom in one row. Then I go to the very last page and drag it to the left of the first page. (So it would be 36,1 next to each other, for example.) Then I drag the last page to the right of your page 2 (now 3 in the Page Layout window) so it would be 2,35 together. You should really make a dummy book and number the pages the way you have them, so when you take it apart you will see what pages should be together. Basically the pattern is (for a 12-page booklet): 12,1 / 2,11 / 10,3 / 4,9 / 8,5 / 6,7
So, yeah, kind of a pain in the butt. But it gets easier once you see the pattern. And if you do this a lot, it's worth it to buy a plugin!