Are you wiping everything and starting with a fresh install on a Rom Slot? I have not experienced ANY, Zero, Zilch issues with installing a fresh install of Cpasjuste's AOSP ROM or flashing his gapps Zip onto a fresh Rom Slot. Just DON'T touch the Stock slot. That would be very bad, and could leave you where you don't want to be.
AFAIK, the safest way is by using Cpasjuste's AOSP on a ROM slot - if you want Vanilla Android, or by flashing Gapps Zip on top of a fresh Stock in a Rom Slot. Just don't touch the Stock slot and you should be good to go. If I am missing the point of your post, please explain a little more. If need be, you can DM me, and I'll try to help you work it out through that channel. I'm not a developer, and I'm essentially new to the Kindle, and tablets in general, but I have been rooting and flashing phones since 2009. If I can't help you achieve the desired results, we can find someone who can. Good luck, and be careful.
PSS: Spaghetti knight has a great tutorial here --->>
http://forum.xda-developers.com/showthread.php?t=2598899
BTW: this probably should go in Q&A section. If a moderator could fix that I'm sure dude would appreciate it. Thanks.
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