I followed the instructions on the official TWRP site on how to install TWRP on the Kindle Fire. So I did wget <twrp.img> adb shell idme bootmode 4002 fastboot -i 0x1949 flash recovery ...
My KF won't finish booting. I started to root my KF from my iMac using these instructions and with the files it points to. I got as far as flashing it with FIREFIREFIRE which appeared to complete ...