Watermark Script

It should be easy to modify the script I have posted it places the watermark on the bottom right not the left.  You would need to change the last transform..

#target photoshop;  
app.bringToFront();  
var logoFile = "~/Desktop/JJMack.png"; // Watermark file should be large for resize down works better than up
var LogoSize = 10; // percent of document height to resize Watermark to
var LogoMargin = 1;                                         // percent of Document height the Watermark should have as a margin
placeWatermark(logoFile, LogoSize, LogoMargin);             // Place Watermark  into the bottom right of document
function placeWatermark(Image,Size,Margin){  
  if(!documents.length) return;   // if no document return
  try{  
  var doc = app.activeDocument; // set Doc object to active document
  app.displayDialogs = DialogModes.NO; // Dialog off 
  var strtRulerUnits = app.preferences.rulerUnits; // Save Users ruler units 
  var strtTypeUnits = app.preferences.typeUnits; // Save Users Type units 
  app.preferences.rulerUnits = Units.PIXELS; // work with pixels 
  app.preferences.typeUnits = TypeUnits.PIXELS; // work with pixels 
  var fileObj = new File(Image);                 // the passed file
  if(!fileObj.exists){   // If file does not exits tell user 
  alert(fileObj.name  + " does not exist!");  
  return;  
  }  
  placeFile(fileObj); // Place in file the Watermark png file
  activeDocument.activeLayer.resize(100 ,100,AnchorPosition.MIDDLECENTER); // Insure Place did not scale layer  
  var SB = activeDocument.activeLayer.bounds; // get layers bounds 
  var layerHeight = SB[3] - SB[1]; // get layers height  
  var resizePercent = (100/layerHeight)*(Size/100*doc.height.value); // Percent to resize by 
  activeDocument.activeLayer.resize(resizePercent ,resizePercent,AnchorPosition.MIDDLECENTER);  // Resize width and height by percentage 
  SB = activeDocument.activeLayer.bounds; // get resized layers bounds  
  activeDocument.activeLayer.translate(-SB[0].value,-SB[1].value); // Move resized layer to top left canvas corner 
  var LayerWidth = (SB[2].value - SB[0].value);  
  var LayerHeight = (SB[3].value - SB[1].value);  
  marginSize = Margin/100*doc.height.value; // move resized watermark into the document lower right corner with some margin
  activeDocument.activeLayer.translate((doc.width.value -marginSize - LayerWidth),( doc.height.value -marginSize - LayerHeight));
  }
  catch(e) { alert(e + ': on line ' + e.line); } // inform user of error  
  finally{  
  app.preferences.rulerUnits = strtRulerUnits; // Restore user ruler units  
  app.preferences.typeUnits = strtTypeUnits; // Restore user type units    
  };  
}; 
function placeFile(placeFile) {  
    var desc21 = new ActionDescriptor();  
    desc21.putPath( charIDToTypeID('null'), new File(placeFile) );  
    desc21.putEnumerated( charIDToTypeID('FTcs'), charIDToTypeID('QCSt'), charIDToTypeID('Qcsa') );  
    var desc22 = new ActionDescriptor();  
    desc22.putUnitDouble( charIDToTypeID('Hrzn'), charIDToTypeID('#Pxl'), 0.000000 );  
    desc22.putUnitDouble( charIDToTypeID('Vrtc'), charIDToTypeID('#Pxl'), 0.000000 );  
    desc21.putObject( charIDToTypeID('Ofst'), charIDToTypeID('Ofst'), desc22 );  
    executeAction( charIDToTypeID('Plc '), desc21, DialogModes.NO );  
};