Plus, don't expect an answer in so short a time span, especially when that happens to be the middle of the night in half the world
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As knc1 said, download the latest jailbreak, do everything as if you were running on a supported FW/device, up to the Update Your Kindle part, where instead you'll be running jb.sh manually in your shell (from main). If you want to do everything from diags, you'll have to do things by hands.