Inserting non-breaking space

Hello,

I don't find any documentation about inserting non-breaking space through FCKe. In a comment I read that writing two spaces will result in a   and a " ", but that doesn't really help, because FCKe is so smart to remove the   when I delete one of the visible spaces.

Is there a way to expand the character map to include special characters like   – etc.?

Kind regards,

Frank