Hi, Alfred

Unfortunately you can only change overall result. it is not possible to change the states for the steps of an execution.
From
http://www-01.ibm.com/support/knowledgecenter/SSYMRC_5.0.2/com.ibm.rational.test.qm.doc/topics/c_analyze_exec_results.html?lang=en
it says:
***
the execution result states are only configurable for the overall result of the test case execution. Changes do not apply to the individual test script step result states, test suite result states, or reports that display weight distribution.
***

This is actually a popular request.
The existing RFE WI is here which is still a backlog and you can find the technical info/approach from the WI as well: https://jazz.net/jazz02/web/projects/Rational%20Quality%20Manager#action=com.ibm.team.workitem.viewWorkItem&id=54597
You may want to comment on this RFE and urge to get the features added into RQM.

Thanks