You have to do your homework. There is a ton of information here, on the FORScan forums and on YouTube. Use the search button and start learning how to do these mods. I can tell you from experience, the search feature is your best option for learning all the mods you can make using FORScan. I've been reading tons of stuff over the past couple weeks and just started yesterday making the changes. You will need to download the program, buy an interface and an extended license and comb through the threads on all the different mods. It's very easy but it takes time to learn, like anything else.