DENVER -- Matt Sorensen and Kim Crane journeyed about eight hours from Salt Lake City to show their support for Republican John McCain at the Democratic National Convention in Denver.

Since Saturday, they have been walking around with signs praising McCain's experience and leadership and ones disparaging Barack Obama. One of the ones most often flashed about reads: "NObama."

"We're showing the people of Colorado and America that not all young people support Obama," Sorensen, who is 25, said.

"It's a great place to be to show the enthusiasm of the Republican Party over here," Crane said.

Sorensen and Crane are among the more than 50 volunteers working at the 24-hour GOP media center less than a mile from the convention hall. Some of the volunteers have come as far away as Dallas, Nebraska and North Carolina, officials said.

About two dozen staffers work the "war room," which is located in a two-story office building, features   prominent Republicans such as former New York Mayor Rudy Giuliani, former Massachusetts Gov. Mitt Romney and Minnesota Gov. Tim Pawlenty, who are available for news conferences and satellite interviews to television stations across the country, especially in swing states.

Outside, pictures of Obama are plastered on the windows with slogans reading "Not Ready '08," and "A Mile High, An Inch Deep." Signs highlighting Obama's new running mate, Joe Biden, criticize his candidacy, quoting the Delaware senator's own words about Obama when they were rivals: "It can't be on-the-job training."

The Republican National Committee is working with McCain's campaign on the initiative, bringing most of the staffers from Washington, D.C., and Virginia. The RNC is footing the bill for this effort but officials wouldn't say how much they're spending.

"Coming to Denver gives us an opportunity to get our message out about Obama not being ready to be president face-to-face," Republican National Committee spokesman Alex Conant said. "Getting out our side of the story is much easier if you're in Denver rather than 2,000 miles away."

Every time Obama has made a charge against McCain in recent days,  the war room has issued statements defending McCain and attacking Obama. Even when Obama defends himself, like he did in Davenport, Iowa on Monday against McCain's assertions that he would raise taxes, the war room responds.

"Th only candidate in this election who has proposed job-killing tax increases during a down economy is Barack Obama," McCain spokesman Tucker Bounds, who works in the war room, said in a written statement. "Making that point to voters is not a scare tactic, it's a truth tactic."

The RNC is also using its presence to court disillusioned supporters of Hillary Clinton. On Monday night, the RNC is holding a "Happy Hour for Hillary" at a downtown cafe.

Conant, however, said the RNC has set realistic expectations about effect of the war room, given that they're hopelessly outnumbered by Democrats.

"We're just trying to provide a little bit of balance and some Republican perspective," he said.

The GOP effort also includes a new Web site, www.notready08.com, with videos and ads, as well as rapid responses to attacks on GOP nominee-to-be McCain and speeches from the Democrats.

Republicans used a war room in 2004 when Democrats held their convention in Boston and they labeled that effort a success. Bush went on to defeat Democratic nominee John Kerry in the election.

FOXNews.com's Stephen Clark and The Associated Press contributed to this report.