NEW YORK (AP) -- Known around the world as Mount Everest guides, a band of Sherpas with a goat trekked to the highest point in the Big Apple for a record-breaking, high-altitude demonstration not of mountaineering but rock 'n' roll. Group members played their roles with enthusiasm. They used picks and poles to climb the stairs of the World Trade Center on Friday. Once they got to the roof, they planted the flag of Nepal -- in mock victory at reaching the summit. Wearing traditional Sherpa garb, they sang both in Nepalese and English as they belted out a mix of songs punctuated by what sounded like yak screams, including, of course, ``Ain't No Mountain High Enough.'' The performance, held 1,377 feet above the sidewalk on the trade center's helicopter pad, was billed as the world's highest rooftop concert. It was taped as a pilot for the VH1 cable TV program ``Rock N' Roll Record Breakers.'' Fledgling rock band members are used to transportation dilemmas, but most wouldn't be willing to haul their drums, a keyboard and guitars up that high. It was just another high-altitude hike for the Sherpas though, whose audience was a few tourists who made the trek for the views of Manhattan. Doing the show was educational for the Sherpas hoping to hit the big time in America. ``When they called from VH1 I thought it was another community gig ... I'd never heard of VH1,'' confessed L. G. Khambache Sherpa, 36, a cab driver from Brooklyn dressed in a fur and silk cap, bulging backpack and colorful boots. ``I really didn't realize until now this would be so big.'' -=-=- 