From your OLD computer...
Copy your ENTIRE iTunes FOLDER to an External Drive... and then from the External Drive to your New Computer..
Full Details Here > http://support.apple.com/kb/HT1751
An Added Bonus is that you will have a Backup of iTunes.
Everything has been already consolidated to my iPod which is serving as my external drive. I am now connected to new computer and I am supposed to go to File - Library - Consolidate Files However the only choices I have are
File - Library - Organize Library - Consolidate Files
File - Library - Export Library
File - Library - Import Playlist
File -Library - Export Playlist