Yifan Lu has an archive of details about it at his website, as well as notes on hacks of the Amazon Kindle and .
For the less techno-speak-savvy, an .ISO file is essentially a compressed image of a disc that can be loaded, copied, and moved around as straight data. Many people use this method to share and backup their favorite PlayStation and Dreamcast games, although you can use the format to run games on a variety of hacked devices. Of course, it's all illegal if you don't actually own the games -- as is distributing them via torrent or anything else.
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