I need to repackage an e-book, 13 pdf files, as a single zip file for ready download, as I learned that the file I've been using is corrupted. The files add up to 4.5 megs, so I'd like to cut it down quite a bit. The problem is that I'm on a mac, and can't find a free utility that does this with any effectiveness, without springing for Stuffit. Green rep and additional promo favors for anyone who can help me get the files in shape for general download. Thanks!