Sorry...
I was testing some Virtual Machines (Parallels Desktop) with some old Windows versions I kept in box... then I noticed the problem comes only with DOS/Win3.11 and Windows 95 No problem with the software itself.
So..sorry...
Trying to make a folder to ISO I get an ISO with file names changed with a number replacing the last letter. I noticed that it is done when same name in the same folder even with different extension ex: sample.ini and sample.exe are changed to sampl1.ini and sampl2.exe :x so when I launch sampl2.exe...