heya; you cant group figures, props, whatever together. what you want to do is parent the arm-guy to the main figure guy. that is, select the figure, then... oh, it's in some menu somewhere, tell it to set figure parent. select the other figure, and they'll be stuck together. but only if you move the main figure; then they'll both move. if you grab the secondary figure, you might be able to move it around by itself. (that's how it works when you parent a prop to a body part, anyhow.) i guess you could try parenting them to each other, but i dont think that works.