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Sorry for the frustration. We also host the example files on O'Reilly's website at http://examples.oreilly.com/9780596007300/. For most of our books, you can find the example files by going to the book page on our site and then clicking the Examples link. This book has two examples links, one for the files hosted at http://fivedots.coe.psu.ac.th/~ad/jg/code/ (which is down) and one for the files on our site.
Hope this helps,
O'Reilly Media, Inc.