Use a Path Deform (WSM) modifier. Use it on the single object, then instance that object using the Spacing tool. It will instance the modifier and you will be able to edit the spline, and the objects will follow.
with 3ds max9, I'm currently trying to copy any object along a spline with the spacing tool of course. But is there a way to copy an object along spline, as a modifier like a loft so I can edit my spline and the object just folow it?? mabe there is a script? cheer