I don't think you'll be able to accomplish this easily. Prosphere can generate only a limited set of performance alerts. Take a look at the Admin Guide and the section on setting Performance Thresholds (page 49 onward).
For a VMAX, if you have an SPA alert specified for a given LUN, SPA will issue the alert, then ProSphere can relay it (email or SNMP). I have several SPA alerts set, and ProSphere relays them nicely.
For a Clariion or VNX, it's a little bit trickier. You'll need to get Unisphere or Navisphere to generate the alert, then ProSphere can relay it as well.
Let us know if that helps!
Try using the Unisphere Central for a change. it's a very good tool and you can get all the relevant performance data that a storage admin needs and that too with upto 2 years( 1 yrs is default) of history information.
Check our from the download section. it's a vApp, so it's very easy to deploy and much easier than the complexity of prosphere. Trust me on that( I have already tried all versions of Prosphere from 1.4 to 2.0).