bawhite40,
I've had excellent results starting new patches from vegetative cuttings. Just dig a bunch of plants, the larger the better. Rinse them off so you can see what you are doing. And divide the roots with a sharp knife. I try to be sure to keep a fair amount of the parent root with each bud and a fair amount of the feeder roots also. Even the feeder roots with the little knots on them will form buds and start a new plant. In fact, when I dig some goldenseal, I collect all of the fine feeder roots that are left behind and lay them on a layer of peat in a nursery flat. I cover them with a half inch or so of peat and keep them in a place out of the sun where they will stay damp. I usually bury the flat up to the rim. After a year or so, you will find many of the roots have developed buds and can be transplanted into a nursery bed.