RAP: Ice Cube, War & Peace Vol. 2 (The Peace Disc) ( * * * out of four) Ice Cube has come a long way from his days as a scowling gangster rapper who called himself "Amerikkka's Most Wanted." These days, he's just as likely to be seen onscreen as heard on record. On the second part of his War & Peace opus (the more ominous War disc was released two years ago), Cube is in a relatively festive mood, with bumping party grooves, sexually explicit romps and reflections on his dozen years in the business. He does reserve some tongue- lashings for materialistic rappers and greedy record executives. Guest appearances include Mack 10 and Ms. Toi on the raunchy You Can Do It -- also on the Next Friday soundtrack -- and former N.W.A. partners Dr. Dre and MC Ren joining Cube to look at where they came from and where they're headed on Hello. He also teams with Krayzie Bone for the upbeat first single, Until We Rich. For a man who has often taken pokes at society, this is probably as easygoing as it gets. -- Steve Jones