Story By Linda Harris WEIRTON -- It's a good thing John Greco doesn't mind working long hours and all hours. Greco, third-generation owner of Greco-Hertnick Funeral Home in Weirton, said his is not the kind of business you can walk away from at 5 p.m. Calls come in around the clock. Given the trust the community puts in his family, Greco prefers to answer all the calls himself