you dont wanna do that. the eeprom cant be written over unless on the bench so its still the right eeprom. if you write another eeprom to the ecu the car wont start because the skc wont match the cluster.

sai, evap, cat, egt, ds o2 sensors are not too hard to remove. i think the water pump wont even throw a open circuit code when removed. The project configuration block is how you enable and disable emissions testing along with other things like misfire detection, vvt diagnostics etc. its a simple bit switch to enable or disable, normally 1= active 0=inactive. Example: catalyst diagnostics (CDKAT in most files) 1>0 no catalyst diagnostics. Just because the cat was coded out that doesnt mean that the down stream o2 sensor can be removed, matter of fact it still need to work as intended and any issues with the sensor would still throw codes. switching off diagnostics is one thing removing hardware is another. read the s4 wiki under tuning it will tell you exactly what you need to do to remove the hardware you dont wanna keep. also sense your car is a auto id swap to the s4 l box file. the s4 m box is the most publicly defined apb file and the l box is the auto equivalent to it so the m box map pack works with the l box flash / tune. also writing the m/l box file to any apb ecu will immo off it in flash. just write it on the bench first 
   good luck

Does anyone have or know where the stock files are for the 551T? I looked and searched but cant find it.

Mainly looking for the eeprom file.

I read both files and cant flash anything back to it. It will flash its own tune back to itself and thats it. It wont even let me load its own eeprom file back to itself. I turned off IMMO in Hxd and didnt help.

I did a checksum and says its not the correct length but thats what I read from it. Right now im just looking to get it back to OEM specs.

Here are the files I read from it.

Here is a link to the file I needed.
http://nefariousmotorsports.com/forum/index.php?topic=2934.0

It will start writing, gets to 6% and stops. Says writing error.

No. Everything is still on it. Not a plug and play type deal. Everything has been soldered in place.

I did just noticed another small chip under the riser. Couldn't tell you what it is. Would have to take it all off.

So there is no way around it other then de-soldering the eeprom?

I haven't done it in years. Be easier if there was a work around.

I was able to remove the daughter board. Was just stuck and had to man handle it.

I just dont understand the point of having the encrypted chip. Im able to read and see the tune properly, just cant flash anything to it. How is that protecting their tune?

Here is the info and DTCs nefmoto read. Can read in standard but not programming.

I'm pretty sure if you compare it to a stock file, there is a little segment that is not a map that has been changed.
That's the encryption chip's write protection.
The content of the 29F chip is fine and without error, but if you read it
The data has to pass through the encryption chip and messes with the data.
And it does the same thing when trying to write to it, therefor the ECU rejects the data.

The tune was burned to the chip and then soldered to the daugtherboard.

Just get yourself a new daugtherboard without an encryption chip.