I just bought a 2924 switch with ver 11.2(0.0.53)SA5 IOS on it. When I do a show ver it says system image file is "flash:/SA5-enterpise". I am trying to load a new IOS on it by doing: copy tftp flash. I doesn't understand flash. I can't do dir flash or anything. What do I do to get a new IOS on here so I can configure my new switch? Thanks