Dosbox: installing from a floppy disk

I tried to write an installer to use a floppy disk inside dosbox. But I think it’s currently not supported. What is the best method to achieve this?

I need to pass some commands to Dosbox, e.g.: mount A /media/floppy -t floppy

Currently, it’s only supported to “file ID or path to executable” but not commands.

Does no one has a solution?