I bought three 2801 routers off ebay at a good price to study for the ccna voice and eventually get my ccnp. I just got the routers and found that the version of IOS is has is 12.4 and running CME 4.3. How can I upgrade the IOS and CME version. I was told that in order to get this I would need a smartnet agreement, but since I am not the original owner I can not do that. What are my options to get the latest version of IOS and CME?