This is a video on how to change certain Toyota vehicle's startup and screen off images. This should work with 4Runner, Tacoma, Tundra, Highlander, etc...
You can purchase these screens from my store, here is the link:
https://www.etsy.com/shop/PottersWorkCo

▬ Contents of this video ▬▬▬▬▬▬▬▬▬▬
0:00 - Vehicle Installation
4:40 - USB Drive Setup (Important!)
7:00 - Troubleshooting
8:46 - Custom Screens for Purchase