Hello again. No worries, by all means.
Thank you very much! Now I’m able to play the game, including the switch between the worlds. The solution was ALMOST the same I have tried before, but not quite. We live and learn.
When the Ctrl-F4, Enter prompt appear, I can now switch cd images in the Magic Dosbox interface, and send the keypresses. Then the game continues as it should.
I have a follow up question. I have now added two buttons to my gaming screen. One Special that change the cd image, and one Deadly Strike that sends Ctrl-F4 and Enter, with a little pause between. I press both buttons when the need arise, and it works very well.
The question is: Can I somehow make one virtual button that executes both of these actions, one after the other?
Thanks again for your help!