Hi,
Create a parameter named "text" of type string and give any value to it e.g. "3DCADForums"
and create a "sketch". In sketcher mode select the text command. Now instead of typing text select parameter from the text window and select your text parameter. Now your parameter value is applied to the text. Create a family table instance and select parameter "text"
In the new instance type any other value for that parameter.e.g. "3DCADTips" If you open the instance you will see the text has automatically changed.