I know that some may already do this, however, I worked out how to update English Wikisource's call of the images of authors for the template, and already we have added an extra 2k+ of images without manual effort (if categorisation is to be believed).

You can see my efforts in [[s:en:Template:Author]] if you are looking to do something similar.

I hope that makes sense. :-)

Regards, Billinghurst