Here are some images from THE BUSINESS ARMY that I've been "greyizing" with Gimp. Not all the images were changed at the same time -- in fact, there was a lag of close to a year between some of them. In that interim, I've become more comfortable with (and, I hope, more competent at) using Gimp. I've also gotten in the habit of saving files as I add each layer of grey-scale. This allows me to experiment with the image I want to use, since sometimes the most detailed and fussed-over one is not the one worth choosing.