E.W.
The quit claim form might not work...if the home is still mortgaged, you would have to go through the mortgage company to see if you qualify to have your name on that mortgage now...double check with them before filing the quit claim.
My mom and step-dad just went through a divorce...both of their names were on the mortgage. As part of the settlement, he agreed to give my mom full ownership of the house, so he fileld out the quit claim form. (totally different set of circumstances - one of the owners dropped off title instead of both) From what I was told by someone I know in the mortgage business...technically the grandparents need to sell the home to you to get your name on the title...they could be wrong though.