How to get the iTunes icon to show up with a Ad hoc build

1. Create a png or jpg image file that is 512x512
2. Bring up the Get Info screen (cmd + i)
3. Find the Name & Extension section
1. Uncheck the Hide extension
2. Name the file "iTunesArtwork" (no quotes, case sensitive, no extension)
3. close the window
4. Add the file to your project.
5. Done.

It is very important that the file is named exactly "iTunesArtwork".  In Xcode you should see this exact name with no extensions.