A SIGE development/preliminary information

Just as preliminary information

In SIGE Lytebox, I would need to add an icon at the bottom of each enlarged image after clicking on thumbnails. In this icon a url will be embedded to be redirected to an external site web page.
I’ll need to fill out fields (or maybe just write text files like multilanguage captions feature?) with each external url associated with the respective image. See the image in attachment.
So, do you think I have to commission this changement directly to the SIGE author Mr Viktor Vogel as a paid work?
Thank you