I have just released the hopefully now-popular iconmod library as part of my ToolBox library. I have included a number of funtions, including BigIcons, which I haven't seen used much yet. I hope people can get their use out of this library, it really does a lot of neat things.
As you can see in this example above, I have changed the regions of an icon (larger than 32x32) seperately. You may have seen in one of my previous posts a bit about "materials" in Maeva. That uses the same library. Iconmod is used for absolutely every obj, turf, mob, and image you seen on the map in all my games now. It makes everything so easily customizable, and easily changable at runtime.
I cannot offer extensive support for my library to everyone, but I hope people get their use out of this.
Awesome textures, by the way!