Ok, I had no time to put it on Youtube, maybe this evening.
Today's lunch time has been very profitable...
Just for test, and advised by Zozo, Hans has enabled the 60-6F segment zone for Rom, and 70-7F for Ram.
The system has found correctly the added Ram, from 1088KB to 1344KB(1376256 bytes in system)
The SF3 manages a SF3.INI batch file that, if found on the SF3 card's SD slot, is executed just before the EP starts. If a modified EXOS has been installed, a 16KB Rom can be put on any of the segments, including on the Ram zone, and it will be found and added to the Rom list, just like EPDOS does. On the non modified EXOS, the Rom will be only found on 60, and maybe on 70(?).
The test file is the Cyrus.rom. This picture is when I have loaded it to the 60(Rom) segment.

Then I have loaded it to 70(Ram). I have loaded EPDOS, but as an extension to call its useful commands, like HROM:

Observe that Cyrus is on 70, but I have loaded it there with SF3, not with EPDOS.

It works correctly from the SF3...