NEW YORK – Metromedia Intl. Group vice chairman Stuart Subotnick is replacing Metromedia president and CEO John D. Phillips, who has resigned from the entertainment and communications conglomerate.Phillips has left to pursue other opportunities. He is giving up his seat on the board of Metromedia, whose chairman is billionaire John W. Kluge. Along with Subotnick, Phillips was involved with the formation of Metromedia Intl. Group, which was created last year through the merger of Orion Pictures, MCEG Sterling Inc., Metromedia Intl. Telecommunications and the Actava Group. Phillips was the head of Actava, a maker of sporting goods and lawn care products. As part of its plan to increase its exposure to the entertainment business, Metromedia also acquired the Samuel Goldwyn Co. and Motion Picture Corp. of America, run by Brad Krevoy and Steve Stabler.