The point was to find a tool that could work in the middle of nowhere far away from the soldering iron when running the emulator in the middle of the night.
Hope you follow me
I already got what suggest, and did it alot. and after 5 times removal it does not look that good anymore.

Did you try it out to see if it solved the problem by turning off the checksum verification??

I think there is a byte in the serial eeprom to enable and disable checksum verification. I don't remember where it is though. I will try to have a look for it later.

I've gone through the serial EEPROM reading protocol in KWP1281 and KWP2000. The problem with implementing it is that half of the pages in the serial EEPROM are not allowed to be read or written. I assume VAG did this to prevent hacking the data on this EEPROM.

That's also the way Lemmiwinks is doing it. Searches the copy of the eeprom in the ram and
then writes the changed adaptation channels into the ram copy. When turning off ignition,
the changes are written back into the eeprom. But I'm not shure if you could update all
locations in the eeprom in this way or if it only works for certain locations like adaptation
chans.
A method to read and write the complete eeprom is to load your own r/w functions into
the ram and link in this code into the message handler. Then you can send your own
diagnostic messages which call your code in the ram and do the reading/writing without
any limitations.

At the moment the only way to read the entire serial eeprom in it's raw format is to read it using an SOIC 8 adapter and hooking that up to an eeprom reader.

I used a willem eeprom programmer and an SOIC 8 adapter to read mine.

You don't have to remove the serial eeprom chip from the circuit board to read it, you can just clip the SOIC 8 test clip onto the serial eeprom.

Yup, the Pomona 5250 would work.