By Frank Macek One of the changes being seen in the current economic climate is where advertisers are willing to spend their money with broadcast networks and local television stations. Advertisers think they have found a perfect opportunity in the bad economic climate to try and tip the balance of power that has existed between them and TV for decades. For the first time, the broadcasters are seeing advertisers making demands of networks and stations as they try to better target their audiences with smaller advertising budgets. Stations and networks have generally forced their clients to buy a schedule of commercials in several shows or day parts. If an advertiser would buy spots in "B" and "C" shows, they usually got the first dibs on the "A" shows with the best ratings - at a premium price, of course. This year, we are beginning to see a fundamental shift that could be a battleground for years to come according to industry observers. Advertisers want ...