Hi,
I've implemented this using 'dummy windows', copy rules and the 'Create Child Incident' action, e.g.
Create an action called 'Clone Incident'
associate it with a 'Dummy Window' - in my example, I've used Copy Rules to copy the Summary and Description as these vary slightly from Incident to Incident. But you'll also see I've given the opportunity to enter a new Requestor and PC Name (we call it 'Config Item'):
Once you've entered a 'User' and 'Config Item' (and possibly amended the Summary & Desc), use an automatic action to save the details, then use an automatic instance of 'Create Child Incident' action to create a clone.
Really helpful guide on Dummy Windows and automatic actions here : http://community.landesk.com/support/docs/DOC-23866
It's complicated stuff but once you get your head around it, you'll wonder how you survived without cloning 