''I've come to grips with the fact that I'm just slow,'' admits director John Lee Hancock, whose epic was slated for a Christmas release. ''But I enjoy fiddling with stuff. My postproduction schedule for 'The Alamo' -- six main characters and 1.4 million feet of film -- was about what I had on 'The Rookie,' which was a simpler movie. And I used all that time up.'' Great Texas horny toads -- did he say 1.4 million feet of film? ''There are a hundred movies I could make from the footage I shot,'' says Hancock, who confirms that some test audiences found the sprawling story confusing. On the upside, no additional shoots were required -- changes all happened in the editing room (so far, about 30 minutes have been excised). What about the rumors claiming that ''Alamo'''s delay was studio-mandated because test audiences reviled a scene where Davy Crockett (Billy Bob Thornton) begs for his life? ''Completely false and laughable,'' says Hancock.