Need help with my first tune

I have searched on this site and others and have not found a definitive and concise answer to my question so I decided to start my own thread in hopes that someone experienced can help me. I am installing some LT's and True Duals this weekend. I will be eliminating the EGR, AIR, CATS and rear O2's. What exactly do I need to do so that I don't get a code and can pass emmissions (if that's possible). We don't have the sniffer test here in Vegas. If someone can help, it would be greatly appreciated. Thanks in advance.