How to replace OpenSuse branding in the installer and during subsequent boots

I want to replace the word “OpenSuse” and the OpenSuse logo in the installer and during subsequent boots for a minimal (no GUI) server. I was able to remove the logo for UEFI installs by updating /boot/grub2/theme/theme.txt. I also updated the value for “GRUB_DISTRIBUTION” in /etc/default/grub.

The OpenSuse name and logo are gone for the first part of UEFI installs but I still see the OpenSuse name and logo when I use BIOS. I also see text “openSUSE Leap 15.5” during install on the screen where it shows “Loading basic drivers.” I want to update that if possible.

How can I do this? I’m familiar with openSUSE:Packaging Branding - openSUSE Wiki. I don’t think the UEFI installer uses a branding rpm. I’m not sure for BIOS installs. I think after the installation I’ll need to replace grub2-branding-openSUSE-15.5 with an rpm including my modifications of GitHub - openSUSE/branding at leap-15.5.

What specific files do I need to update? What else can you tell me? Thanks