Why not do it the way that Apple suggests here,

by mrmacfixit Moderator - 1/11/13 3:01 PM

In Reply to: Moving Itunes Library by EVO8Gold

http://support.apple.com/kb/HT1364?viewlocale=en_US&locale=en_US
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<span>Read first and then go step by step. No tears then.
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<span>Of course, you already have a backup of all your music?
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