You can download the Application Here, you can safely un-install it as well.
Alert is for Calendar Events, Notification is everything else.
Make sure you reset your tones back to default before you delete or you’re stuck with them (unless you reinstall the app).
It works for the meantime until Palm officially make this suport native to the WebOS. Which is actually already in the WebOS, just not enabled. So it's coming, just not sure when.