To insert one tool multiple times on another tool, first select the tool that you want inserted (use Alt+LMB to select a tool on the canvas) then go to Brush > Create InsertMesh > New. You can insert the mesh as many times as you want on another mesh. To insert it, just drag with the left mouse button and release. You will notice that after you insert the mesh, ZBrush automatically masks everything but the InsertMesh. That gives you the freedom to manipulate the mesh with the Transpose tools (Scale, Move, Rotate). After you are satisfied with its position, rotation and scale, click and drag on the canvas to clear the mask.