help moving iTunes to a new computer

I am reposting this question since I am still having trouble moving iTunes from my desktop (Tiger) to my Macbook (Leopard).

I have successfully moved the iTunes folder to my new computer and all my playlists, album artwork etc are there.

The problem is the actual music. On my old computer all the albums are saved under Users: Shared
The new computer only has only user.

It was suggested that I move it to the iTunes Music Folder.

I tried that. Only half of the shared library copied - an error saying the remaining files could not be copied came up.

When I opened iTunes the songs won't play because "the original file could not be located"
- if i click to find it, I can then go to the iTunes Music Folder (which now contains 3 folders : Downloads, Podcasts and Shared).

If I click on Shared - the music is there, and if I then click on the individual song it loads it and will play it.

Is there anyone to do this en masse? With over 13G of music I can't reload each song individually. I am assuming the location I copied the music too is wrong.

I hope this makes sense. Thanks in advance for any help.

L