Q) How do I attach ceiling tracks to hang blankets to my stucco ceiling?

A) For stucco ceilings, attach a flat horizontal support first. For example, you can attach a wooden frame  (like 2 x 4 studs) and then attach the ceiling track support brackets to that flat support.

Here is a video on hanging blankets from a drop ceiling that may help give you an idea how this is done.

http://youtu.be/9yV9Nk2mhDc?list=UUbGPwvJGKXYWmGTMOjmpSYg