NBox: How to see foreign (Greek, Spanish, Italian etc.) subtitles.

Problem:
Nbox has the ability of showing subtitles (ssa/smi/srt files) but only in Chinese and English (!!!).
Solution:

Download AviAddXsubs (http://www.calcitapp.com/AVIAddXSubs.php).
Then use it to import subtitles to the video file (then you can delete the srt file)

AviAddXsubs: import Subs to a video file.

Then watch the video on Nbox but don’t forget to enable the subtitles from the remote control of the unit.