vROPS 6.0.2 Trying to block alerting on a Windows Drive Letter

I am still new to vROPS but I am trying to basically stop it from reporting on things in our environment that we don't care about.  Namely the T drive on Windows SQL servers since it is the Temp DB drive for us.

I have created a Custom Group -> "VM T Drives" and it reports back the VMs I would expect.  My problem is getting to do the overrides on alerting of the T drives in this group.  I have tried transposing this walk-through for my scenario but I guess I am still too new to figure out how to get the alert to stop alerting for the machines in this Custom Group.

http://pubs.vmware.com/vrealizeoperationsmanager-6/index.jsp?topic=%2Fcom.vmware.vcom.core.doc%2FGUID-2B67E8FD-9DC9-4337-8E88-A6339137F1B3.html

So any direction that can be provided will be greatly appreciated.

Thanks,

Mike