Subtitle Size

Can someone help me on this: I would like to make the size of subtitles in ninoTV bigger. Does someone know how to do it?
Many thanks!

You may find the answer in the web link below:
Just follow their instruction to copy the Helvetica Font file to your ATV.
It works!

Copying the Helvetica font works really well. However, now the subtitles are rather too big and bold when playing through frontrow.

Does anyone know of a way of making it a bit smaller and regular instead of bold? Can one adjust how frontrow decides on font size?

Or is it possible to make the default size in the Helvetica suitcase smalle before installing it to Apple TV?