Jonathan Miller & Co., Marina del Rey, Calif., has been merged into Dublin Productions which is based in Hollywood and Minneapolis. Executive producer Jonathan Miller brings a couple of his Miller & Co. directors into the Dublin fold for commercial representation: Tom Megalis; and feature filmmaker Peter Hyams….Meanwhile Bob Morrow, a.k.a. director Bob, has departed Dublin and is headed for Cognito Films, Santa Monica….L.A.-based executive producer Michael Dill is departing Crossroads Films to pursue an opportunity that involves feature films….Director Lorraine Senna, who’s repped for spots via The Directors Network, Studio City, Calif., has been tabbed to direct VH1’s first venture into TV movies, Sweetwater. The telefilm is based on a forgotten band that performed at Woodstock in ’69. Senna’s credits include HBO’s The Sopranos and spots for such advertisers as Bally’s, BC Tel and Pennsylvania Power & Light….