Unable to add self-ripped HD+SD encodes to iTunes 11
OK, after many many hours of experimentation, I've come up with a trick that (so far) seems to work.  Not sure if this is the best way of doing it, but here it is.


Go to the "Music" section in iTunes (I know, this sounds counter-intuitive, but trust me), and create a new playlist.  I call mine "New Movies Test Bed."  Set the View to List View (this makes it easier to work with, again just trust me).
Drag the SD version of your encoded media into the playlist you just created.  It should add the file and copy it to your iTunes media library like normal; however it won't show up as an HD+SD entry, since you obviously only copied in the SD version.
Now select the HD version of your file, and while holding down Alt (Option) drag it into the same iTunes playlist where you dragged the first file.  It should magically turn into an HD+SD entry; however it has not yet copied the second (HD) version of the file into your iTunes library (you can verify this by right-clicking and choosing 'Show in Finder"; you should only see the SD version of the file in the window that appears.)
In iTunes, right click on the file you dragged in, choose "Consolidate Files" then click the "Consolidate" button in the dialog that appears.  You should see iTunes start copying the HD version of the file into your iTunes library.
Verify that both HD+SD versions are in your iTunes library by once again right-clicking and choosing "Show in Finder."  You should see two files, one of which should be named "Movie Name (1080p HD)" (or presumably "Movie Name (720p HD)" if you did a 720p encode).
Finally, go to the Movies section (or TV Shows section if you're importing a TV show).  You should see one, and only one, entry for the file you just imported.