This weekend on TV, radio TODAY AUTO RACING 4 p.m. -- NASCAR Nextel Cup Checker Auto Parts 500 qualifying at Avondale, Ariz., Speed Channel 5 p.m. -- NASCAR Craftsman Trucks Chevy Silverado 150 at Avondale, Ariz., Speed Channel PRO BASKETBALL 7:30 p.m. -- Celtics vs. Indiana at the FleetCenter, FSN, WWZN (1510) 8 p.m. -- Houston at Memphis, ESPN 10:30 p.m. -- San Antonio at ...