@Butters
Thank you for your reply, link and spoiler for original Garmin logo.
As a newbie frankly I am a little bit confuse regarding step by step to change a splash screen Garmin Aera 500.
By the way I already download softwares and install:
1. RGN_Tool
2. GIR_Editor
3. Updater.exe

And again, as a newbie, could you please tell me how to do it in a correctly. Thank You.