New on the ISAF site: Racing Rules Q&A's Booklet.
All valid Q&A's in one pdf-file, including the latest: Racing Rules Q&A 2009-020.
If you print them two sided, with two pages on one A4 and with the book function on your printer engaged, you end up with a 25 paged A5 booklet. Should fit easily in your judges kit.
Racing Rules Q&A 2009-020 does not contain any applicable information about the rules. It is more a reminder of the Q&A panel that they only answer specific situations. The Q is too general and therefore not answerable without additional information.