Move iTunes collection to media server?

I am also looking for information on moving my files to a server, however my files are scattered on 2 external drives, and both c and d drives on my laptop. What is the best way to move all these files, artwork etc...I would like to "do it right the first time" Not all these files are purchased from itunes, some of my own, which have imported artwork, what is best to put it all together on server?

the best way i have found to do this is actually make 2 copies of your music folder on the external harddrive. keep 1 for itunes and 1 for other sources. i then changed my computers defalt music player to windows media player. i then re-loaded 1 of the files into the computer into media player and it tagged the music. i then saved this file from media player to the harddrive. this worked with the cd's ive downloaded and some of the music purchased from itunes, but i cannot be certain all itunes songs converted over, my database is 18,735 songs so this took 3 computers since i didnt have enough space on any 1 computer for such a large job. with album artwork it was like 198GB or so, just the music alone is 97.8 GB. then you can delete 1 of the 2 origional files off your ex harddrive. this way music can go on any mp3 player, ipod touch and flash drives for cars and boats home computer to computer or sharing.
THE ONLY THING I HAVENT FIGURED OUT YET IS THE ALBUM COVERS HAVING A PROBLEM KEEPING THEM ON THE HARDDRIVE IN A SEPERATE FILE.

FIRST TRY TO GET ALL THE MUSIC IN 1 FILE IN 1 FORMAT EITHER LOAD ALL INTO ITUNES OR SOME OTHER MEDIA PLAYER, THEN DO THE FOLLOWING SEE NEXT REPLY.

Copy \Music\iTunes\ folder to the NAS.
Hold Shift and launch iTunes.
Select *Choose library* and select the iTunes library.itl file on the NAS.

This will retain all artwork, ratings, date added, playlists, playcounts, etc.