How do I transfer all tunes(only some appear in the imovie 11 itunes library) in my itunes library into the new iMovie itunes library? How do I restore all the music (not all added from imovie 9) play in my videos transferred from imovie 9 into iMovie 11?

Question

How do I recover the many imovie 9 projects that did not transfer from imovie 9 into imovie 11? How do I make all of my  itunes library accessible to the itunes library in imovie 11. How do I recover those music audio tracks lost in the transfer from  imovie 9 projects  into imovie 11? How do I add music from my itunes library into imovie 11 projects. Some do and others cannot. 

Answer 1

for purchases from the iTunes store do this:
connect your device and right-click or control-click it in the iTunes Source list, then choose transfer purchases from the shortcut menu that appears.
for everything else check out this post by Zevoneer.