by "directly from the image file" you mean right clicking on image file and select unmount ? because, as I said before, unmounting is per device, not per image. it does not care for specific files. I do not understand the logic in adding unmount to only image file extensions, so you'll have to search for image files on your hard drive just for unmount option to be available? the image file itself is irrelevant to the unmounting operation. also, whats the point in unmounting anyway ? edit: I have now checked DT preferences and was surprised to see file associations under integration menu. so my registry file is not needed at all I assume. DT lite can do it all by itself (well, except .bin files) also you can bind hotkey for unmountng... guess I wasted my time, but what the hell, at least I've learned something on the way.