MBN. First I dig the seeds out of the hips. Then you have to SCRUB them clean of the hip pulp. I use a metal sieve and scrub the seeds against the sides to get all that pulp off. The hip pulp inhibits germination so you want them clean. You don't need to worry about hurting the seeds. They're real tough! Then I wrap the seeds in damp paper towels and put them in a sandwich bag and label it with the name of the seeds. Then all the baggies go into a grocery bag and into the veggie crisper in my fridge. I start checking them at about 4 weeks. Any seeds that have germinated go into a seed starter tray and under the lights. Some people just put them right into starter soil and wait for them to germinate there. Either way it's fun and keeps me busy.
Dave, it's not hard to do at all. And it doesn't need to cost a lot either. I do it all in my basement and then out in the yard with mostly stuff I have around the house. I do buy seed starter and potting soils, but I use that stuff anyway, and I buy the clear plastic cups. It costs very little.
What it does is give me something "green" to do in my long, cold, dark, gray winters!!!