Ok... Here's what I came up with, and I figured I would share it with everyone. I know in particular, Kathy would like it! 
Ok... here's our starting image (Meet Lauren):
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After a few adjustments in LR (split toning, vignette, etc), we get this:
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Then, onto Photoshop. I found a texture (oldpaper.jpg), that was a download from an old tutorial. I converted it to B&W, adjust contrast etc, and upscaled it to be the same dimensions as my original image (oldpaper_upscaled.jpg). I copied this texture into a new layer in the original image (and in this particular instance, I rotated it 180*). I changed the layer mode to "Linear Burn". You can play with other modes to achieve different effects. Then I adjusted opacity of the layer to adjust the effect (55% in this case).
Here is the final result:
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Here is a link to a zip file containing the texture files, as well as the Lightroom preset that I created for this. I created the preset to match my needs, so you may need to adjust it for your particular situation. Enjoy!! Let me know what you guys think!
http://www.cornettphotography.com/WFF/OldPhoto_SupportFiles.zip