Smart Playlists or Manually.
In the sidebar on the left, select Music.
This shows all your tracks without them being shown in these "subdivisions", known as Playlists.
If all your tracks have the name of the album included already, you can use a Smart Album to gather all the tracks of a particular album together.
Click File > New Smart Playlist and fill in the criteria you want for that Playlist. (the name of the album)
All tracks in your library that meet that criteria, will appear in the Smart Playlist. (They do NOT move out of the Music Library)
Repeat until done.
Then delete all the subdivisions that you did not make.
File > Creat New Playlist.
Create a Playlist for each album and drag each track, from the library and not from the iTunes created subdivisions, into the correct playlist.
Once you have done that, you can delete the iTunes created subdivisions.
Does that help
I have just converted my music library from windows media player to itunes. Itunes has sub divided many of my albums that contain more than one artist into separate albums. how do i combine these sub divisions back into the original compilation albums?
I have not copied these to my ipod nano yet.