I've updated the article Managing Scripts With Script Menu to include a script that will create the requisite folders in the appropriate locations such that you can have your iTunes AppleScripts appear in the user scripts section of Script Menu and the application scripts section when iTunes is frontmost. It will also create sub-folders using the names of my script categories. All you have to do is run the script and then copy/move your iTunes AppleScripts to the newly created folders.
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