Walkthroughs for the quests from Helgen Reborn, a user created plugin for Skyrim.
Find Froki Whetted-Blade at Froki's Shack, where he lives along with his grandson Haming.
After asking about, and possibly starting, Kyne's Sacred Trials, you can ask Froki about Haming. Froki tells you that Haming is his grandson, and that his parents were at Helgen when the dragon attacked. You can tell Froki that there is a house waiting for them both at Helgen.
After doing so, Froki agrees to come to Helgen, and asks you to escort them. You can decline but, as you can fast travel with them both back to Helgen, this escort is not a problem.
This quest is an optional one, if you wish to get married to Cienna, and can only be started once Helgen is completely rebuilt in A City on a Hill. If you haven't yet been to the Temple of Mara in Riften, you need to go there and speak to Maramel about marriage and then, if you don't already have one, either buy the Amulet of Mara from him for 200 Gold, or do the quest The Book of Love, given by Dinya Balu, who is also in the Temple. The Amulet can also sometimes be found in treasure, or for sale in shops. There is one in the Upper Pinewatch Mine, which has already been visited during The Changing of the Guard. Cienna also needs to accompany you at least once, but this does not have to be on a quest or in combat; accompanying you to the Temple of Mara is perfectly fine.
Once these conditions are met, wear the Amulet of Mara and speak to her in the Hammer and Anvil. Most of the conversational choices for the quest will only be shown when she is in the Hammer and Anvil, so wait until she is. If you fast travel with Cienna using the Private Tower as a destination, she may get "trapped" in the area outside it, so wait an hour to get her unstuck.
"Cienna asked me to come and see her later. I should give her a day and go see her."
After a day has passed, go and find Cienna again. This time say "Hello Cienna, How are you today?" Follow the conversation through, and Cienna says she needs a hug and the screen goes dark. Then she asks you to gather some flowers for her.
"Cienna has asked me to gather her some flowers and bring them to her. I need 1 Red and 1 Blue Mountain Flower, 4 Lavender, 3 Tundra Cotton and 4 Dragon Tongue."
The various flowers are, as she says, all available locally in Helgen - assuming that you haven't already harvested and used them. Once you have gathered them, return to Cienna and say "Hi Cienna, I brought you some flowers like you asked!", and she takes them from you and places them in a pot beside the counter in the Hammer and Anvil. After doing this, she talks to you again and proposes marriage. You can decline (cruel, leading her on like that, but you can still marry her later if you change your mind). If you say yes, Cienna states that she wants a gold ring with a diamond (although the text on the screen when Cienna is speaking says silver, gold is required), and that you have to make it. She will arrange for Marcus to get a priest to perform the ceremony.
"Cienna has proposed to me and I accepted, but she needs me to make her wedding ring. She mentioned she likes gold and wants a diamond in the ring. I should craft the ring and take it to her."
You need a Gold Ingot and a Diamond. Gold Ore can be found in a number of places around Skyrim, and ingots can be found in treasure. Diamonds can be found in various places, including during mining and in treasure.
Once you have the required materials, go to a Blacksmith's Forge; the closest one to Helgen is the one in Riverwood. Use the forge and choose Cienna's Wedding Ring as the item to make.
Return to Cienna and say "I have your ring Cienna! Are you ready?" She gives you your Wedding Band (a Gold Diamond Ring which Fortifies Health by 70 points) and asks you to take them to the Priest whilst she gets changed.
"Everyone is waiting in the courtyard for the wedding ceremony. I need to take our wedding rings to the priest so he can begin the service."
Afterwards, you are now married and Cienna can still accompany you if desired. This completes the quest.