DRM refers to the fact that you can't view Amazon Kindle books on other devices (including your computer), or on other Kindles - i.e. no sharing, the purpose of DRM.
The Kindle supports Mobipocket files directly. You don't need to write a script to do that.
Non-DRM Mobi books, like free e-books found online in Mobi format, or files you convert to Mobi files, are already supported on Kindle.
Hack let you convert encrypted Mobipocket files that were intended for another reader so that that work on Kindle.
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