GLOBAL MARKETS-Dollar inches up, stocks flat to lower before Fed

* European stocks drop as Greek worries continue * U.S. stocks near flat but Apple shares jump * Dollar inches up ahead of Fed policy statement (Updates with U.S. markets, changes byline, dateline, previous LONDON) By Caroline Valetkevitch NEW YORK, Jan 28 (Reuters) - The dollar edged up and world stock indexes edged lower on Wednesday as investor focus turned toward the Federal Reserve, which will deliver a post-meeting statement later in the day. Worries that Greece's new