While Wal-Mart has turned to the ballot in a number of cities and towns to win the right to build its giant emporiums, the Inglewood initiative is significantly different. The proposal would essentially exempt Wal-Mart from all of Inglewood’s planning, zoning and environmental regulations, creating a city-within-a-city subject only to its own rules. Wal-Mart has hired an advertising and public relations firm to market the initiative and is spending more than $1 million to support the measure, known as initiative 04-A.