Installing PS4 1.76 OMSK / Demo Mode guide, PlayStation 4 developer @Modded Warfare returns on his YouTube Channel with both a 1.76 PS4 UI Editor and UI Mod tutorial for changing the PS4 home screen images.
Download: PS4 UI Editor.zip (9.7 MB) / FileZilla / Paint.NET
To quote: PS4 UI Mod Tutorial Changing Home Screen Images
How to swap out the application launch and background images on the PS4 home screen through FTP using the WebKit exploit.
The required file downloads for PS4 UI Editor, FileZilla and Paint.NET are linked above.
Thanks to @Figure03 for passing along the news in the PSXHAX Shoutbox today!