The previous release of Mickey's Space Adventure (1984)(Walt Disney - Sierra)
are in dsk format.
However, the game uses disk volume to identify the disks. 
	Disk 1 side B is vol.1
	Disk 2 Side A is vol.2 and
	Disk 2 Side B is vol.3.
	
So they has to be released in nib format

Note: I have tested disk 1 side B and disk 2 side B and both of them work.
      I am not a serious gamer and I havent gain access to disk 2 side A nor
      do I know if the game will access disk 1 side A again with a different 
      vol#.
      If you found them not working, please prepare a walk through and I will 
      see what I can do....