My mother passed away January 10th 2012. Her executor was her close family friend due to her remarrying 15 years ago. We have been told by my stepfather that he is the new exectutor. My mother DID NOT WISH THIS, due to keeping everything separate when she remarried. The law firm handling the case will not tell me anything except to talk to my stepfather. We children wish to change the exectutor back to the original individual. How is this done, how much time do we have to file a motion?