gerber file opening problem

hi guys ,
i just downloaded gerber file from analogdevices.,but i can't open it......... ..pls tell me a way to open the file.......it has .pho and .rep files.........its urgent

what do you mean "open it"? With what program? You'll need a gerber viewer like GC-Prevue. Gerbers are text files, but reading the text is pretty meaningless.