Thank you for your response, good to know that the problem is not on my side. Now I use multiple disk images for different games linked to one single Windows disk via the profiles, working great.
But I’ve got another problem^^ I copied the two Mt32 MIDI files to the MidiRom folder, MIDI music is playing fine under dos games. But in Windows games the MIDI music is just giving out random heavy distorted digital cracking noises. I installed the Creative sound driver from the mdosbox driver package, general sound is working fine. Is there a fix for the MIDI music?