Same really but Aud S4 B5, ive got to the stage were i have my own bespoke stage 1 map ready for testing but require a AFR Guage/reader 1st, its taken me around a year to get to this point, i use galletto 1260 with ebay cable reprogrmmed to work with galletto and tunerpro and winOLS and i have gen VCDS (VAG diagnostics) for logging with.
There's heaps to read up on here and is a welth of knowledge but it wont be givern out, you have to work to find things out