About 30 or 40 showbiz commandments get shattered by The Ten Commandments at Hollywood's Kodak Theatre, but let's start with one: Thou shalt not cast a celeb non-singer as the lead in a sung-through musical. There may be biblical verisimilitude in having a pitch-challenged Val Kilmer as Moses the good book describes him as an awkward orator but you've got a crucial mismatch when the deeper-lunged supporting players belt out applause-baiting, angst-laden ballads as if auditioning for Israeli Idol. Unlike DreamWorks' 'toon version, where Kilmer voiced God and Moses, the Almighty doesn't get any lines, or many allusions leaving scant indication why that bush is burning or where those commandments came from, amid a post-9/11 emphasis on humanism and tolerance. One waits in vain for Kilmer to break into his old Top Secret! song: ''How Silly Can You Get?''