It's all done, tested, debugged and working fine:
If you have a picture of your favorite player in Rich Text comments, it will be nicely scaled to column-width when the column is smaller than the image, and uploaded to HTML as part of the Kifu. Images are included as PNG.
Better still: When there are Audio comments in the SGF, they will be uploaded into the HTML as links to WAV files!
I will post a link to an example a bit later, when also the diagrams look a little better.