hyperion,

regarding your second sugestion:
The other option is to ADD el.lng and el.T9, following this Tutorial
Don't search for "adriatic" firmware for W580, because this is for newer platform.

I have found 2 files el.t9 and el.lng for w850 but i am not sure if they can be used for the w580i as well. Is these files suppose to include the greek language as well as the english?

thank you.