Vista - Windows Media Player playlist

Hi,
I know that this might sound like a noob question but I have to ask it. How
can I make windows media player automatically organize new added files so
that they are bunched up with previous songs with the same artists. I have a
playlist in my player that has different file types with different locations
in it. I organized all the songs and videos so that the videos are on top and
the rest of the music is alphabetically arranged below the videos. When I add
other media the player just puts them in the bottom of the playlist without
arranging them according to their name. So for example if I have a song from
an artist whose name starts with A and I want to add it to the playlist it
just puts it at the bottom of the list after Z instead of putting it up with
the other A's. iTunes library has that feature that it automatically puts all
the songs from the same artists together and I always wondered why windows
media player didn't do that.

Pardon the blunt reply, but this is the default behaviour for Windows Media Player. Any new media items (video or audio) will be added to the bottom of the playlist.