The built-in COM+ actions don't provide support for defining roles, so you would need to write script code to automate that. See the Roles COM+ docs for more details:
http://msdn.microsoft.com/library/en...tions_1g6m.asp
You can specify that a Component should be installed as an event class by adding a Name of IsEventClass, Value of True on the Properties tab of the COM+ Component action. The Components collection shows the custom properties that are available:
http://msdn.microsoft.com/library/en...tions_4nji.asp