John B. Clough, executive VP of marketing for Casio has been elected president, replacing Gary Rado who retired at the end of March …Jeff Shell, Fox Cable Networks Group CEO, joins Gemstar-TV Guide International as co-president and chief operating officer. He replaces Peter Boylan, who resigned earlier this month. Fox's parent owns 40 percent of Gemstar. Henry Yuen, Gemstar's CEO, made the appointment …Jim Sanduski, marketing director for Samsung Electronics America's visual display products, has been named marketing VP for its Visual Display Products Group …David T. Murray, who has guided Winstar Communications' government affairs activities in Washington, D.C., joins the Satellite Broadcasting and Communications Association as government affairs VP …Margaret Sheehan, ex-sales director for Hilton Hotels, joins the Custom Electronic Design and Installation Association (CEDIA) as professional development director …Best Buy has added four new finance VPs, including Bruce Besanko, finance planning and management; Jim Muehlbauer, Musicland; Mike Norona, shared services; and Ryan Robinson, finance and treasurer. Separately, the retailer promoted real estate exec Mark Ostergaard from director to VP of asset management …Gary Omand had been appointed national accounts manager for the Gentec International's Imaging Division …John Powers, ex-Corning exec, joins Equity Holdings, the holding company for B&W Loudspeakers and Rotel Electronics, as business manager.