how to create a working assembly model in creo 2.0 parametric...????

Go to APPLICATION tab provided on the right side of the creo 2.0

1.you are simulate various things, like attaching a servo motor and analyzing the kinematic mechanism.
2. Invoke Cam mechanism, Pulley mechanism.
3. You can also do stress, Thermal analysis , Etc etc.
4. There are many many things in application.
5. You can even apply gravity if necessary.
Creo is really awesome.

https://www.youtube.com/user/nanthukk007
Here's the short tutorials you could fed up with..!