In Gimp, all you have to do is paste your emblem into your new layer.
Before anchoring it down, you can scale it (SHIFT T) and the percentage of the scaled down emblem is shown in decimal form: ie. .50 x-axis, .45 y-axis, so 50% and 45% respectively. Note that these numbers are the finished scale of the emblem, not the percentage taken down if that makes sense.
I am unsure of what you mean by the movement part, do you mean the location on the main texture? If so, simply moving the mouse over the emblem would give an x- y- location of the emblem on the texture.
Just out of curiosity why does BoB need to know how much the emblem was scaled m8?
