Lets you paint face selection with the painterinterface
'Paint Selection' : Start/Stop Painting
'Faces/Polys' : Choose between Face and Polygon Selection
'Single/Brush' : This is the PaintMode - 'Single' selects only the face at the current mouseposition - 'Brush' will select all faces inside the brush area
'BrushSize' : The size of the brush
'ClearSelection' : Clears the current selection
You can map the 'Paint Selection' button to a hotkey - use the 'PaintFaceSelectionKey' and assign it to a key.
Copy pb_PaintFaces.mcr to your uimacroscripts directory - restart Max and you will find it under CustomizeUserinterface - Category 'Piranha-Bytes'