Concerning the national characters issue, I haven't tested this out but here is a thought:

I've just read "The sqlite3.exe command-line doesn't do UTF-8 or UTF-16, it does whatever encoding your computer is configured for."

If I am correct N900 is in UTF-8, so the problem with national characters is on the side of the csv file (which is in in a custom encoding).

On this site: howto convert iso-8859-1 charset html files into utf-8 charset files
is in my opinion the solution.

In the terminal execute (Instead of CP1252 should be your national characters encoding):

This should be on one line.

To check if your national language characters converted to UTF-8 correctly, type:
and review the output if national characters appear.