For this specific comb I used little cream and paper roses with a soft pink center.
Remove the wire which is the flower's stem, leaving the bottom green which is the leaves.
I used a glue gun which works nicely but you can also use any other craft glue. Plug in your glue gun and let it warm until the glue flows out of it without pressing the trigger. Remember NOT to put your glue gun on it's side, the glue will flow into it and it WILL brake.
Put a blob of glue on the bottom of the flower, not to big otherwise it will goo out on the sides and it will look hideous, and paste it on the bridge of the comb.
Fill up the bridge with flowers.
Repeat step 2, until the whole bridge has with flowers.
With this picture, I used pink flowers which is much bigger so I only used 5 flowers, but the size of flowers you use, or what type (it doesn't have to be roses) is up to you, or up to the style you are looking for.