ex wont sign quit claim deed so i cant get loan mod from boa

[Ray Sebestyen]

My brother lives in arizona, He is recently divorced and having a tough time making payments on the house they bought together, BofA and the government modification folks say they cant do anything until she signs a quit claim deed which she does not want to do. i believe she is concerned about future financial responsibility for the house she doesnt live in anymore even though az is a non recourse state.
my questions are:
Is there anything he can do besides foreclosure?
If she signs the quit claim can he then refi or modify the loan to remove her from any future financial responsibility for the house?
Is there anyway he can do the modification without the qc deed?
any advice is greatly appreciated.