You would need SLM 7.1 and Incident Mgmt patch 9004 ...those should give you this functionality!
Make sure that you get the second release of patch 9004 (dated August 2008 or later). The original patch 9004 (dated March and May 2008) was riddled with bugs of every kind, and will trash a working Incident Management installation integrated with SLM 7.1. I have not had a chance to test the new release of 9004 yet, so I cannot vouch for their having fixed the many problems with the first release. Be sure to install it on an expendable development environment first.