By Ellen Olivier After murdering her children in Euripides' classic "Medea," Annette Bening, with husband Warren Beatty, helped celebrate the launch of UCLA Live's Eighth International Theatre Festival at the play's opening-night party. No matter that the play is nearly 2,500 years old, "the same issues are with us," including "disposability of women," said guest Claudia Weill, a director who explored women's issues in her films "Girlfriends" and "It's My Turn." Alan Schwartz, president of the Royce Center Circle, which supports UCLA's performing arts, said that although the university has presented plays for eight years, "Medea" was the first original production to be created by the UCLA Live series. "This is the first time we've ever produced a play from scratch," said David Sefton, director of UCLA Live. Actresses Sharon Lawrence, left, and Annette Bening at the UCLA Live "Medea" party Sept. 23 at UCLA's Royce Hall.