The answer is, simply, no.
However, you can send command line parameters to TestExecute to run selective projects. So, if you have projects A, B, and C in a project suite, you can tell TestExecute to run Project A alone.
Within projects, you can tell TestExecute to run specific script routines to execute certain select tests. So, if you create script routines to run the tests that are indicated by your TestItems, you can call them from the command line as well.
So, as mentioned, you can't send a command line to TestExecute to disable projects and/or Test Items. However, you can use the command line to run specific routines and projects.
See
http://smartbear.com/support/viewarticle/10998/ for information about all command-line functions. The article indicates TestComplete but the same command line arguments are available for TestExecute.
