Duplicate requests and OpManager integration

Is there a way to mark one request as a duplicate of another? We are using OpManager to automatically open tickets when it sees a problem, however with randomly reoccuring events, it is opening a new ticket on each occurance. What I really need is for it to recognize there is an existing request open for that subject, and just add notes to that request that the problem reoccured.

Barring that functionality, at a minimum it would be nice to click the new request and say mark as duplicate of "request #".

Also when OpManager sends a "Clear" alarm, would it be possible for ServiceDesk to make that a note in the appropriate already opened request? As it is it will try to open a new ticket on the "Cleared" alarm.