I was having some problems with my scripted Load Test stations sometimes not registering.
Reading the help, it seemed to indicate that running the LoadTesting.Stations.Rescan() method would verify that all the stations were available before running the test instance. Instead what seems to happen whenever I run this, is the test instance only runs on the Master station, ignoring the slave stations. If I comment this out, it runs it using the slave stations as well. The only problem with not doing this is that sometimes my slave stations don't seem to respond and the load test hangs.