“movies in that folder” your movies are not sorted into named folders? Maybe I am confused by your post… XBMC needs to know the source type also. Is this set to movies with a scraper set ?
I rip my dvd’s using dvd shrink into .ISO’s in seporate folders by name (some abreviated) then run Media Companion to scrape and setup the .nfo along with the movie fanart, logo and folder icon. The just have XBMC check for updates as needed when adding new movies. Saves time on updating the library.