[QUOTE=ccfj1;617012]Correct.

Also correct, these are the modules that are loaded when the nav unit is updated.

Only some are editable, (via the tabs) or by direct import.

You already provided me the answer. Sme are editable some aren't. So how can I edit those editable? Is there a specific software?
BTW my idea is:
1 to load your files (rom_col2 and 3).
2 change the string from "set colori" to "giorno / notte" (day night );
3 edit numbers of keys: number 1 to day and number 2 night.
Thus the switch of the color setting will activate the swicth day and night.
Do u think it will work?
last but not least I am doing this on a V32 and NOT on a V31...
Thanks for your advice...