Multi-Level Sort for Case Lists

Hello All,

From what I can tell there's not an outright way to do a multi-level sort for Case Lists. I've got the default Case list that I'm trying to sort primarily by a priority status (Severe, Normal, and Low w/ Severe cases up at the top) and then do a secondary sort by the date the case was created w/ the oldest cases being pushed up the list and the newest ones farther down. Is this possible through a Create Script? I cannot find a way to do it under administration.