oh guys solved...actually was totally my fault!!!!!!!!!!!
I cannot see the mod because i did not scroll the mod menu, as in the screenshot! The drop down menu is intended only for xcom/ufo, tftd and/or total conversions!!
So paths that worked for me:
The main game:
/home/nicola/.wine/drive_c/openxcom
(mod subfolder here won't work, unless i imagine you set a different path, but i'm too oncompetent to do
)
and mods
/home/nicola/Documenti/OpenXcom/mods
in the latter case, the path has to be linked in the current wine configuration, see
here.
In the end, may i humbly humbly ask to Warboy, SupSuper and other administrators here to update the installation wiki page, or at least to use a more simple language? Have mercy...ok i guees it is solved!!!!!