I must say this works like a charm now!

I added and tried:
A500.34.5.rom (OS 1.3, autoselected by 'Model A500')
A500.37.175.rom (OS 2.0.5, autoselected by 'Model A500P')
A1200.40.68.rom (OS 3.1, autoselected by 'Model A1200')
A1200.46.143.rom (OS 3.1.4, autoselected by 'Model A1200')
A1200.47.111.rom (OS 3.2.2, autoselected by 'Model A1200')
CD32.40.060.rom (OS 3.1, autoselected by 'Model CD32')
CD32.40.060_ext.rom (OS 3.1, autoselected by 'Model CD32')
This satisfies all my ROM needs and for the A1200 either of 40.68, 46.143 and 47.111 worked.