This is very interesting, if perhaps a little beyond my normal comprehension of how to make things work in any software, never mind BIAB.
If I'm understanding so far... I can convert the Sonar .ini file automatically in BIAB using the method in the link above. At that point the first 100 patches should connect by assigning the relevant patch number in BIAB.
If I want to do the same for more patches, I have to change the numbering system as per your last post. Do you do that by opening the new .pat file in Notebook??? Make the numbering changes. Then save it as a new .pat file. Or is there some other way to make those changes?
Sorry I'm really not as deeply conversant with this stuff as you are!