It's hard to say without seeing them but scan them in, in PS duplicate the layer and put it to mulitply (if they are badly faded) then play around with the opacity.
You could use any of the B+W conversion or scan them in as B+W if your scanner has that option.
Open the layers palette in elements (if it's not already open) drag the background layer to the new layer icon on the layers palette (I thnk they are on the top in elements but I'm not sure) that will give you 2 layers the same, click on the top layer then on the layers palette is a drop down box that says normal, change that to multiply.
![]()