Fidelity Information Systems is making headway in updating the older software it acquired with its $1 billion purchase of information services titan Alltel in early 2003. Getting a new makeover is Mortgage PhD, a data exchange Web site launched by Alltel in the spring of 2001. The Web site began as a bulk file exchange portal where subscribers had access to aggregated public record property and real estate tax information via Mortgage Servicing Package, Alltel’s