Use this to move/copy users between cpanel servers - last time when moving users by hand it took 2 days to move what I can now in about 10 minutes (exclude tar.gz time) and more importantly for users, passwords remain the same.

Take backup of the accounts using the following script: ( in source server)
# /scripts/pkgacct username
This will create a backup file under /home with name cpmove-username.tar.gz

# /scripts/restorepkg username

From http://sakafi.wordpress.com/tag/cpmove/