Fastboot Kindle Fire 2
For posterity here's what I did (from memory, no guarantee the exact wording of the menu options will be the same):

Make sure you have Android SDK installed and Kindle Drivers installed.


Open up devmgmt.msc (device management window)
Go to device TATE-PVT-08. Right-click. Click "Update Driver".
Click "Browse my computer for driver software"
Click "Let me pick from a list of drivers on my computer"
Choose Kindle Fire 2 in the list that pops up.
Install ADB Composite Driver.
Open up CMD with administrator privileges.
Go to sdk\tools in your Android SDK.
Download http://fs1.d-h.st/download/00021/Pv3/KF2_SRT_10.2.3.zip (Kindle Fire 2 images).
Unzip the file.
Follow the rest of http://forum.xda-developers.com/showthread.php?t=2035047.