I am still looking at the documentation, but am unable to get a handle on the difference between an executionworkitem and an executionresult in RQM.  I am using a GET command to try to get the (either executionworkitem or executionresult) from a test case.  When I try to specify the test case (test case 415), I get all the test cases in my RQM.  There doesn't seem to be any sample commands that really work for me.  I am using RQM 5.0.2 and the RestClient for Firefox.  Once I get the right GET command, I think I will be able to update the test execution results.