HT1727 how do I transfer my iTunes from an external hard drive to a different computer?

Question

How do I transfer my iTunes from an external hard drive to a pc?

Answer 1

If you don't have all of your music files within the iTunes Music folder structure, simply moving all of your music to a new location will not result in your iTunes library automatically updating the file paths to all of your songs appropriately. If you have a few other locations in which you store your music, you can take the ExportImport script turingtest2 wrote, make the modifications below, export the results, paste them into Microsoft Word or Excel, do a Find and Replace with the correct file location, and then import the new locations. To use the script, follow turingtest2's instructions on this thread as posted on Dec 19, 2012 6:28 AM.
Note that the modifications, while they worked for me, show my lack of experience with VB as the progress bar will no longer work. Definitely be sure to back up your iTunes library file before executing the script with the below modifications, but doing this for 3500 items didn't even take 2 minutes for the script to run.
Line 89 was:        Prog=True
Line 89 is now:     Prog=False
* I had to do this because otherwise the progress bar was erroring out. So, i just turned it off.
Lines 164-165 were:    
'File.WriteLine "<#>" & .Location           ' Not so useful if working with missing tracks
'File.WriteLine "<Album>" & .Album
Lines 164-165 are now three lines (the middle one is the only uncommented line): 
'File.WriteLine "<#>" & .Location           ' Not so useful if working with missing tracks
File.WriteLine "<Location>" & .Location          
'File.WriteLine "<Album>" & .Album
Finally, insert this whole block around line 270 so that it looks similar to the others:
        Case "<location>"
          If T.Location<>Value Then                ' Don't update if value won't change
            T.Location=Value
            U=U+1
            Trace T,"Updated Location"
          Else
            V=V+1
          End If
          'If Trace Then MsgBox "Updated Location"
Note that I had to comment the very last line as well or else the program errored out. You won't be able to trace the results either.
Just thought I'd share this in case anyone else needed something like this.