This shot is just great, the effect of the sillhuettes are used to full effect ... it just gives the whole piece this really romantic and sweet feel (you can almost hear yourself saying "Naaaw" out loud ). Fabulous photo and a definate from me.
There are EXIF managing software, but I don't really know them.
However, I don't think you can insert the data manually and be sure it is the right data.
How can you be sure of your focal length? And unless you were shooting manuall you will have trouble knowing both your aperture and shutter speed