I start a fresh folder with calamity's build and yours.
I did some test using calamity's one and All went fine.
I then tried yours, using the same mame.ini
And it did the job the same way.
I just added the sample folder setting
And toaplan hack worked as a charm.
So far, I don't really know why it did not
work the first time. It has for sure something
To do with my mame.ini but I don't know
what I missed.
Anyway, I don't need that manual resolution
Switching using ChangeScreenResolution utility
Before launching shmupmame42
Only remains groovymame.
Note : 32bits didn't worked at all for me,
It returned segmentation fault.
Thank you for your answers that kept me on track.
Regards.