Sub ImportPictureAtSize()

   Dim oSlide As Slide
   Dim oPicture As Shape

   ' Change slide index position to the first slide
   ActiveWindow.View.GotoSlide 1

   ' Set oSlide to the first slide in the presentation.
   Set oSlide = ActiveWindow.Presentation.Slides(1)

   ' Set oPicture to the picture file on your computer. Set Link To
   ' File to false, Save With Document to true, and place it in the
   ' upper left-hand corner of the slide, sized to 1 by 1 points.
   '
   ' NOTE: Before you run this code replace this text string:
   '   "Put image path here!"
   ' with the path to the image you want to import. For example:
   '   "c:\MyImage.bmp"
   Set oPicture = oSlide.Shapes.AddPicture("Put image path here!", _
      msoFalse, msoTrue, 1, 1, 1, 1)
   ' Now scale the picture to full size, with "Relative to original
   ' picture size" set to true for both height and width.
   oPicture.ScaleHeight 1, msoTrue
   oPicture.ScaleWidth 1, msoTrue

   ' Move the picture to the center of the slide. Select it.
   With ActivePresentation.PageSetup
      oPicture.Left = (.SlideWidth \ 2) - (oPicture.Width \ 2)
      oPicture.Top = (.SlideHeight \ 2) - (oPicture.Height \ 2)
      oPicture.Select
   End With

End Sub