The Kindle supports Mobipocket files directly. You don't need to write a script to do that.
The hack allow ENCRYPTED Mobi files to be read on the Kindle. So you can buy a DRM-protected mobi book and read it on Kindle.
The Kindle DRM wasn't hacked to REMOVE the DRM from Kindle purchases, but added to other books so that they too could be read on the Kindle.
Granted the PDF converter seems to have some trouble with graphics PDF's, but for books the converter works very well.
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