Can you add support for Unicorn3D, or at least other programs that can add 3D Objects to cursors, like in the 2007 release of RW Cursor Editor and the (currently forgotten) RW Icon Editor? That would be helpful for making those 3D cursors like yours.
Also, can you add a type of brush/pencil/flood fill for all RW apps to fill all of one color on the canvas with another? Your current script is pretty finicky sometimes, and the script fails at those times.