Alright, so I was trying to follow the guide on using a custom rom on kindle fire 2. I got to the point where it asked me to issue a fastboot command to verify device and I got a bunch of numbers and letters followed by the word device, so all seemed well. I then rebooted out of fastboot and issued the adb command to back up my stock files. I can't get it to work at all. I've scoured the forum and as much as I appreciate everyones work and dedication, trying to find the right article is a mess! I don't know what guide to use, or how to backup my stuff. I literally just want jelly bean and google play store on my tablet, that's it. I assume rooting is also necessary. Can anyone point me in the right direction or help? 10.4.8 is my software version.