Kindle Fire Background Help

[Houdini111]

I have had a Kindle Fire (2) for quite some time now, and have finally decided to take over it.
I have successfully rooted it, get rid of the lock screen ads, and installed a custom launcher. However, I can't seem to change the background on the launcher (no matter how many I try) or the lockscreen. I've found many tutorials about changing both, but none work.
For changing the lock screen wallpaper, they all lead to /data/data/com.android.settings/files to find a file called "wallpaper". However, my folder is empty (even with "display hidden files" turned on).
With ther launcher background changing, no matter what method I use, it doesn't give any errors. All it does is simply not change it.

If anyone has any experience with this, I'd love some help.

Thanks in advance,

Houdini111

[Houdini111]

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