Change Kindle Fire Lock Screen Is it possible to change the Kindle Fire's lock screen from displaying ads to a user chosen file or one of the random presets that come pre-installed? 

If so, how would one go about this?
AFAIK there's an "ad-free fee" you could pay to Amazon 15 bucks. Apart from that, available solutions require you to root your device:


Kindle FIre HD 2013 - Remove Ads from Lockscreen


  
  root your Kindle Fire HD 2013
  Download and install ES File Explorer from amazon AppStore (its free)
  Start ES File Explorer and enable Root Explorer
  Browse to /data/securedStorageLocation/dtcp/
  Mark the adunits folder
  Go to "more" and "settings"
  Remove the permissions from "rwx --- ---" to "--- --- ---"
  (Optional) Remove all folders in the adunits folder
  

Disable Kindle Fire HD Lockscreen Ads - YouTube
More via a simple Google search ;)