Audi A4 1.8 Turbo 2003 computer change

Hello friends this is an Audi A4 1.8 Turbo 2003 AWD which the original computer (8E0909518AF) is kemo and when it heats up approach. 10 MINS. goes out ;; I bought another one used with the same number but the box does not work for something on the network and discovered that I must adapt the new computer. And the problem is ke aki in Honduras what is VW, Audi, BMW, they are super scarce and I have no experience in how to do it seems easy but I do not understand I hope your help