This is the time when you learn to use the forum's Search feature.
You copy a filename into the field, to where the logo file lives in your loaded image.
https://www.ntlite.com/community/index.php?search/642456/&q=oem+logo&o=date
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\OEMInformation]
"Logo"="C:\\OEM\\Winaero.bmp"
If you use a reg file, the path must have double \'s. The BMP file can be in any path you've copied to the mounted image.
Code:Windows Registry Editor Version 5.00 [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\OEMInformation] "Logo"="C:\\OEM\\Winaero.bmp"