The Kindle supports Mobipocket files directly. You don't need to write a script to do that.
Plenty of free e-books in Mobipocket format show up fine on Kindle.
The Kindle is already able to read more than just Amazon DRMed content, it can handle a number of formats.
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.
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