mGalaxy forum

Yep, make a try in local, because all is automatic, you don't need database for that, you just need exact file name and good format.

I don't see why it don't work

Nestopia saves screenshots individually-i.e., not in a folder.  With mGalaxy open, press SHIFT.  At the bottom of the menu, make sure SNAPSHOTS SEPARATED is not selected.  That should do it...

All you have to do is put the pics in a folder and direct mGalaxy to that folder for snaps. Just make sure they are all in .png format and that the .png extension is lowercase and the filename matches you ROM name exactly !!