Leave something on the shelf long enough and it'll either ripen like cheese or rot like garbage. Guess what: This ain't Camembert. Production on Richard Benjamin's lame and painfully dated comedy about a pampered Jewish princess who sets out to reform a XXX-rated rapper originally wrapped in the spring of 2001, but didn't make it into theaters until the dog days of August 2003. Whatever might have been funky or fresh about the humor now stinks to high heaven. There's trouble with a capital "T" when rap's notorious Dr. S (Damon Wayans) drops his latest opus, "Bad Medicine," on an eager record-buying public. The song titles alone "Shoot the Teacher," "I Am the K...