How do you make silk flowers smell like real flowers?

How do you make silk flowers smell like real flowers?

Hi,I just love doing flower arrangements and have just been asked to do some wedding flowers for a bride. She wants silk artificial flowers.
I was just wondering if any one would know how to make silk flowers smell like real fresh flowers, Thanks!

source: http://answers.yahoo.com/question/?qid=20090613210450AAUw5mF