iTunes library moved

I recently bought an external harddrive to save stuff on my computer while it dies its final slow death. In the meantime, I’ve also decided to keep all my music there since it’s got a lot of space. I moved my music folder over to my external, but now iTunes doesn’t know where my music is. Everything in the folder is in the same organization it was before, just minus the crucial beginning parts. Is there a way I can easily import everything over just as it was before?

I’ve heard of people using these instructions successfully:

Sorry, got mixed up with my links. These are the instructions my friend used (but the first ones I gave probably work too)

Wow, thanks. And also thanks for not pointing out I could have very easily googled that information myself.