Chepos .... You're USAir?
If so, you're a Star Alliance partner and you board at BP9. That's just above UA employees and eligibles and before all other airline staff.
You're one of a very few Star carriers we do not have a reciprocal ZED Low in C class with, so which class you end up in, could depend heavily on the Gate closeout Team.
If you'd like to check loads, send me a PM.
Good luck !