how to move iTunes files from external and internal drives to a single drive? I'm trying to merge two different iTunes libraries.  The bigger one (on an external HD) is the default library, so I am trying to open the smaller one (on the internal HD) to export it.  However, as the first step of this I need to option+click and hold down option while iTunes is loading.  It then prompts me to enter the location of the library to open, and I select the location of the smaller directory.  However as soon as iTunes comes up it appears no different than when the default, larger library is loaded.  When I go to preferences it still says the location is the location of the larger library!

What am I doing wrong?

Update: I tried renaming the external library so iTunes couldn't find it, but it still showed up! When I tried exporting to see what would happen, I got a mixture of both internal and external paths in the resulting XML file.  I tried doing the same thing when not trying to open a different library and got the same result.  So it looks like somehow iTunes has files in both places, but I need to move everything into a single location (internally), so how can I do this?

To clarify, I have two iTunes folders, one on an external HD and one on the internal HD, and it appears that when I open iTunes it knows about both folders.  I only want one folder (on the internal drive) so that, for instance, if I disconnect the external HD things don't get confused or messed up.
Turns out that somehow the internal iTunes got imported into the external one without changing the location of the files.  So I went to:

File &gt; Library &gt; Organize Library &gt; Consolidate Files


which caused it to move the files into the external drive library.