Ameriquest Mortgage led the direct-to-consumer subprime origination market at the midway mark, a new Inside B&C Lending analysis reveals. Based on data contained in its securitization filing, Inside B&C Lending estimates that Ameriquest originated $16.84 billion in new loans through its retail branch network during the first six months of the year. That performance, a 76 percent rise from the same period in 2003, left Ameriquest, which has launched a high-profile branding campaign as part…