Leave cream cheese and butter in a bowl at room 
     temperature until they become very soft (or soften
     in microwave).  When manageable, stir until well 
     mixed.  Add cream or milk and mix until well 
     blended.  Add flour and salt; mix well.  Form into 
     two balls and chill a little.  When moderately stiff,
     roll out on a lightly floured pastry cloth to about 1/8" 
     thick. 

     Makes 2 single pie crusts, to be filled before baking. 
     Good for quiche or piroshkis.