Vista - Powershell TRAP for non-terminating errors

Hi there,

I have some questions about the powershell error handling for non-
terminating errors.
I'm writing a script for Exchange 2007 and want to trap Exchange
specific exceptions like
[Microsoft.Exchange.Management.Tasks.MachineNotClusteredException] and
[Microsoft.Exchange.Configuration.Tasks.ManagementObjectNotFoundException]

The problem is that these are non-terminating errors and I cannot trap
them using the

trap
[Microsoft.Exchange.Configuration.Tasks.ManagementObjectNotFoundException]
{
............................
}
Script blocks.

If I want to trap them I need to add the -ErrorAction Stop to my
cmdlets. This however changes the Exception type to
[System.Management.Automation.ActionPreferenceStopException], which
prevents me from using different trap{} scriptblocks for my error
handling within the same scope.

This is driving me nuts. Is there any way to get the non-terminating
errors trapped ????

Cheers & Thanks,

Mark