File Disk

This little tool by Bo Brantén allows the mounting of a disk image to a drive letter. It can be found here

Usage

filedisk /mount 0 "C:\Full\Path\To\Image\disk.img" D: filedisk /umount D:

Of course, you have to adapt the path and drive letters to your system. Note that the path to the image file must be complete, i.e. including drive letter, or it will complain about not finding file "D:"...