Hi Geert,
Thanks for getting back to me and for the link, but I was hoping that I could simply place the existing deb file in
debian-installer/installer/build/localudebs
and then re-build the gtk mini.iso.
Just so that you will know, for this experiment I want to include the Virtualbox 6 and FreeRDP deb packages that I have locally (see above) in the building of the Debian Installer. If I can get them to install in the build then I want to next edit the installer script to do a couple of additional things.
This is an exercise in virtuilization to see if it is possible as a first step.
Cheers,
Lonnie