Excuse me for maybe stupid question.

I installed navit from app manager, but I suppose doesn`t has a map for my country. So I downloaded it from the link in one of previous posts.
The file I downloaded is .bin.
I do not saw folder navit in my N900, so I made one and copied the .bin file inside.
But still navit does not show a map.

Please tell me - what I should make to have working navit?

Thanks in advance.