It may just be the hype coming from Tenacious D fans, but Jack Black (High Fidelity, Jesus' Son) supposedly steals the show in Orange County, a new comedy directed by Jake Kasdan and written by Mike White (Chuck and Buck). This is saying a lot, considering the cast includes such veteran comics as John Lithgow, Lily Tomlin, Chevy Chase and Catherine O'Hara. As a supporting actor, Black plays the loser parolee brother of Colin Hanks (son of Tom Hanks), a high-school student suffering through dysfunctional family life--with a wheelchair-bound stepfather and O'Hara as mom. Hanks has high hopes of escaping his family and getting into Stanford to study creative writing. His chances aren't bad but, of course, something goes wrong, admission is denied and--aided by his brother's girlfriend, Ashley (played by Sissy Spacek's daughter, Schuler Fisk)--he only has a day to correct the problem and secure his future. See "Opening Friday" for theaters.