Oooops! I forgot! BDAqua is right. PC cannot read ST disks without changing the bootsector.
There are two solutions.
1. Format a double sided - double density disk on pc and use it to exchange files. You should be able to use it for making a disk image.
2. Use this program to fix the boot sector of your ST disk.
http://www.programmersheaven.com/zone20/cat117/3131.htm
http://www.programmersheaven.com/d/click.aspx?ID=F3131