Yes, Mark's method is not difficult and it works.  I've added mountain ash berries to trees this way.  Play with the settings.  Blueberry bushes aren't hard either if you use a smaller tree.  Grape vines from trees... I don't know.  You could make your own vine and then it would be easy to add the grapes using the replicator for the grapes and leaves.
Post pics.

Never Give Up!