Pointing iTunes to a different folder.

[Greg the dogsitter]

You know how iPhoto will let you use a different folder for photos? You can hold option when starting the program, and it'll let you point to a different folder, or create a new library?

I'd like to do the same in iTunes, as I have a library stored on an external drive. I don't want to combine libraries; I just want to manage the songs in the second library for a bit.

Changing the iTunes folder changes the storage of new songs being imported, but doesn't give me access to the library on the external drive, which is what I'm looking to do.

Suggestions?