At my best friends wedding last May, I took roses from my bouquet and some from her bouquet to try and root them. They were gorgeous champaign and duotone red roses.
I cut off the tops, cut the stems into 5-6 inch lengths, placed them into a pot with moist soil, and put a glass jar on them. I kept them in indirect sunlight, under a slightly shaded plant, and by the summer they had started to root.
In the fall I took them to my mom's house to winter, and I believe that she had buried the pot and all, and covered it with straw. I will let you know if they managed to survive the winter, but they looked very healthy by the fall.
I hope they survive, as it would be a great momentum of my best friends wedding.