Add Notification Sound to Sense?

[03stampededak]

I am loving the new TB after 2 years on the OG Droid. HTC's Sense is brand new to me. How do I add an mp3 as my notification sound?

 

[03stampededak]

Adding a ringtone was easy enough - I clicked "Add Ringtone". The Notification menu doesn't seem to provide this option.

 

[03stampededak]

Already answered here: http://www.droidforums.net/forum/htc-thunderbolt/133285-notifications-2.html