Grouping of Nagios alerts

Hi!

I want to group alerts in Nagios and want to know if and how that can be done?

So something like 1 alert for multiple alerts and I am notified only once than multiple times.

I tried using nan and nans (two of the opensource solutions) and tried hooking them into Nagios but after getting the alert initially the perl scripts that are part of nan and nans are not called by Nagios.

Is there some workable solution for this kind of problem?

Thanks,
Jack.