Hi
I install my Creative Zen Xtra 30 gb in linux with this steps:
1.- I install libnjb library from ubuntu repositories.
2.- To test the device, I use gnomad2, a simple browser for that mp3 jukebox. Works OK
3.- I install amarok compiling with flag --with-libnjb
4.- In Amarok I install the device manually (autodetect doesn't works). I choose the Creative plugin, withou any mount point (this device doesn't mounts). Any preconnection/postconnection command.
5.- CONNECT,  I see the music list ok

My problems:

Problem 1
In the browser, I see the list grouped by artist. I haven't any choose or option to change this grouping. Inside each artist, the music is grouped by album.
For Example:
-Artist1
--------Album1
--------Album2
-Artist2
--------Album1
--------Album2
In IPODs we have the same groupings like the local collection, and we have access to the player's playlists. But here, there aren't any control to the grouping. Why? It's Ok? Anyone has the same problem?

Problem 2
If I want to transfer music to the local collection, or simply listen music in the amarok playlist, I experimented some problems
When the list is all  closed (showing only the groups of artist) I can't transfer or move to the amarok playlist any music from the player.
I have to open all the nodes to make this option. The Artist node, and the inside Albums nodes must have open and showing the tracks for transfer or move music to amarok, collection or playlist.
If I want to transfer all the music from a Artist, I have to open this Artist and , open, one to one, all the albums and the tracks inside.
If one album is not expanded, that album will not transfered.
If I want to transfer all the music, I can't select all artist (because if you read problem 1, the grouping showed is by Artist) and select the transfer option, because any album and track is expanded in the tree.
Is there any way to transfer music withou expand anything, selecting only the node groupings?
Its normal this problem? or a bug?
And another question....is there any option to automatic sync the music to the collection ?
I put few examples to better understanding:

+Artista1
+Artista2
+Artista3
In that example if I choose one or more artists node and select Transfer, anything is transfered.

-Artista1
  +Album1
  +Album2
  -Album3
        *Track1
        *Track2
-Artista2
In that example if I choose Artist1 and transfer, only the Album3 is transfered, because this have his tracks expanded.
If I choose Album3, and transfer, the samething.
But If I choose Album1, not tranfer, because is closed (not expanded showing tracks).

Can anyone help me?
Thanks for your time and sorry for my poor english.