With MultiChamfer you can create soft edges. You can select the number of iteration and the radius. The script actually iterates the chamfer function of the Edit Poly (it works only on Edit Poly!) to achieve the smooth edge. You can use the “bias” spinner to modify the distribution of the edges.
tested on: 3dsmax 2010, 3dsmax 2012
installation: Drag-n-drop in 3ds Max. Find the script in “Blago Script” category