Run the script to install the sproc on the database of interest, then to reset the identies, simply run 'exec uspResetIdentities' from Enterprise Manager.
Like the one posted before, the use of the SP is like this: proc_alerts 1,18. This will show the first 18 alerts on the system. OR proc_alerts 20,35 will show from 20 to 35. This lets you manage the list without letting go out of the screen.