Good morning to everyone!!! I made my Introductions in the corresponding thread.
This is an attempt of a noob to tune their car. Technically, I am more inclined to the mechanical aspects of tuning. Programmatically, I have some experience with the development of simple firmware for custom IoT devices (C, Keil etc.)
Let's dive in the process.

Equipment:

1. Generic KKL cable from our Asian friends https://www.aliexpress.com/item/4001149836868.html?spm=a2g0o.order_list.order_list_main.5.21ef1802LUXlqh

Software:

1. Tunerpro free version https://www.tunerpro.net/downloadApp.htm
2. Nefmoto flashing S/W https://github.com/NefMoto/NefMotoOpenSource
3. ME7Logger http://nefariousmotorsports.com/forum/index.php?topic=837.0
4. me7sum https://github.com/nyetwurk/ME7Sum/releases/tag/v1.1.3

Car Specs

1. Audi S3 8L with AMK engine
   1.1 car was registered with an APY engine
   1.2 engine is fitted with SCAT forged rods
   1.3 engine is fitted with R8 coils
   1.4 I converted the ECU to wideband, installing a Bosch original O2 sensor
   1.5 wired the VVT since it was never wired
   1.5 rewired coils using original plugs
   1.6 HKS recirculation valve (Super SQV IV + recirculation kit)
   1.7 HKS Super Power Flow filter
   1.8 Forge turbo intake pipe and main turbo hose
   1.9 Aeromotive 340 in-tank fuel pump
   1.10 AEM X-series boost gauge

ECU Specs

1. Part Number: 06A906032HJ
2. H/W Number: 0261207436
3. S/W Number: 1037362287
4. Version: 0002
5. Please see attached file for more info if required

Progress so far

1. Extracted copy of original bin file (The ECU came in with a flash from an unknown tuner. The car is driveable but on boost (@1.6 bar ~ 23 psi) it cuts and goes into limp mode)
2. XDF used from golfputtputt's HS Map Pack http://nefariousmotorsports.com/forum/index.php?topic=4936.0
3. Disabled Secondary O2 sensor, following S4Wiki instructions
4. Engine is fitted with 0280156063 Bosch injectors, so i changed KRKTE value to match my injectors using the calculator provided by hammersword http://nefariousmotorsports.com/forum/index.php?topic=4021.0
5. Still have to successfully build ME7Logger, since I face a few issues with building the solution

Next Steps

1. Identify mapping strategy from previous tuner
2. Tune to Stage 1
3. Add multi-map function/patch

NOTE

I know progress is slow and it is baby steps for the more experienced, but I am trying to learn as I do. Therefore, please spare me with your mercy!

its not required to disassemble the flash to achieve those steps, also its not 'easy way' for beginner
multimap for this file could be found here on nef with corresponding xdf
full definitions also available

also me7logger available already compiled, use visualme7logger as a GUI or vegical with j2534 interface for logs
youre just overthinking this

1 maps_qt is a limiter of maximum selectable modes
2 there is no listener. its not an android application. also you cannot use any button as only few monitored by ecu and wiper stalk not in list
3 multimap routine checks the ram locations of clutch sensor (b_kuppl), cruise stalk and so on and do something if conditions are met

just buy cruise stalk