Shera, I've never done it personally, but I've talked to people who rooted cuttings from their hibiscus..and several on the Tropical forum discussed sowing from seeds of their plants..
I'd imagine taking a 4" cutting, and placing in well-draining soil w/some type of plastic on top to creat a humid environment should do it..I believe some sun, (not direct) should be offered during time of rooting. Toni