An easy workaround for FS asking for Game-disk 1 :
I do own all DVD's and created an .iso file with the name MFS DISK 1. (used ISO Workshop for this)
The file contains the contents of the original DISK 1 except (!) the (huge) data2.cab, that is not needed.
MFS DISK 1.ISO has a size of 12 Mb.
Just mount it once in Windows 10 and FS works great without the DVD in the drive.
Update: Did some more investigations and found that only ONE file is needed in the ISO : 0x0409.ini (22kb)
The others are not needed at all.