Thanks for that update.
It does seem that the feature request you mention (MDL-13905) is after a similar goal, but I'm not quite sure why the requester needs this feature in 1.9. He wrote: "However, it (GIFT) doesn't support an image to show with the question."
It is possible in both 1.9 and version 2 to add URLs (i.e. add HTML img tags or links to sound files). I have attached a text file containing two MC questions in the GIFT format. The first question is the same as above, which contains a link to an MP3 in a course directory. This works in 1.9, but is no longer possible in version 2.
The second question in the attached file is more complex. It contains links to both images and sound files (OGGs). Even the feedback contains links to sound files. Because all these images and sounds are in an external site (Wikimedia) this question will work in both versions 1.9 and 2.
The issue is that most moodle users will want to upload multimedia to their own Moodle system (i.e. not rely on an external repository), and then link to these media files in their GIFT formatted questions. This is no longer possible in version 2 because the 'course files directory' has been discontinued.