[Q] Kindle Fire rooting issues. topic

Greetings, XDA-D community,

I have a Kindle Fire 7.4.9 in my possession and an ultimate goal is to drop Kindle OS and get KitKat on it (open for better options, was told KitKat is not the best for tablets).
It's also my first rooting experience.

I unsuccessfully tried to follow 3 guides below, but didn't get far.
http://forum.xda-developers.com/show....php?t=2351201
http://forum.xda-developers.com/show....php?t=2192818
http://www.reddit.com/r/kindlefire/c...otloader_root/

I managed to get SuperSU thru the first link (Bin4ry v3.3), but that was the end of it.
I can NOT get anything done thru KFU (0.9.9 and 0.9.6) due to Boot Status: Unknown - at least that's what I think.

I'm trying to root on Windows 7 x64, also have up-to-date Java and Android SDK.

Any help pointing me in to the right direction is highly appreciated.
Thank you.