Harihareswara has run or helped run several distributed sprints/hack days/hack weeks. Here are some tips that help. The approach is less "top-down schedule" and more "here's how to adapt to and support the emergent ways people will act".
A free 38-page sampler ebook on assessing an existing project, starting to think about budgets and money, and teaching and including unskilled volunteers. Includes the introduction and table of contents for the full (forthcoming) book.