You can model the wall as a regular plate element. I do encounted the same problem and modelled the shear wall as a vertical plate element and the connection to the other framing elements depends upon, how do you actually use the brick wall(I mean load bearing).
I used Risa-3D to model the three dimentional structure.
Just an expression of my doubt...
A brick wall has different stiffness in compression and tension. I dont know whether SAP2000 is capable of doing so. I will watch this thread for better understanding.