Kelvin Walston adds sauce to the chicken and pork he is cooking Friday at Ribfest 2001 in St. Petersburg's Vinoy Park. Rib vendors from Florida, Georgia, Kentucky, Alabama, Ohio, Virginia, Michigan and Pennsylvania have set up their grills. The event also includes performances by some classic rock bands _ including Steppenwolf, Foghat and Blue Oyster Cult _ and several local groups. Ribfest runs through Sunday and opens at 11 a.m. each day. Tickets are $10 at the gate.