again a request regarding the web page generation

In brief, I wish to have the file name of the generated HTML files to be configurable. A more detailed explaination follows below:
I have to make multilingual web pages. No big deal (even though not very sophisticated using hand-made HTML). Of course I want to re-use the original images (and thumbnail images) and just have multiple sets of HTML files pointing to the same image files.
But this causes problems because XnView seems to have hardcoded the file name of the thumbnail page ("thumbs.html"). It is not sufficient to rename "thumbs.html" to e.g. "index_english.html" because then the links from the thumbnail HTML files (e.g. "Img_1234.html") back to the thumbnail page become invalid.
What I need is a possibility to specify the name of the thumbnail page, preferrably in the setup window (where it would saved / loaded if this feature should ever be implemented). Furthermore, also a way to specify some pre- or postfix for the HTML files in the "original" directory. After all, I have to have a different set of them for each language.
Regards,
Torsten