Contact and other on salomè

Thk Johannes for your help, now the model, with you help terminate the analisys.
Now I need another help.
I see that after importing a file IDEAS is simple to convert it in mud using Salomè.
I'm a new user of Salomè and Code-Aster so I need help about:

-How to insert contact in Salome (Pulley with rivet on example)

-How to define a local csys on Salome to associate it a force and boundary

-How display max principal stress and deformate shape

-How have average stress on post Salome

I try to attached (are about 2MB) an example file prepared in salome and if you can

solve it and send me .comm file I study it.

Regards
Jacopo