Okay, now what??

Fortunately I still had a copy of my entire iTunes library on the computer in the attic. Maybe a little out of date, but should be close enough. I put it on my new 32G thumb drive (which it came closer to filling up than I expected) and then transferred it to my sparkling new Seagate external drive.

Now how do I tell iTunes where my music library is? It's still showing all the old iTunes content but all the links are broken.