Hi!
Have you called Jayson at chippeduk? I know he is a expert with the Bosch management systems. I think he can also do the Siemens ECU in the 2.0 8v. He uses the same Optican tool as we do which excludes the 2.0 8v ecus. The ecu can be emulated direct to PCB, then once the remap file is produced it can be written direct to the eeprom. I know other companies have tools which will do the 2.0 8v via OBD.
I spent hours on my sister inlaws GTI Cab 2.0 8v and could not push any more than 10bhp 12NM max. The power alone was not really noticable but applied with the rest of the setting in the remap the car feltl much sharper and smoother.
We dont do the 2.0 8v remaps as it take too long to do for so little power gains. Custom Code will have a stock of generic remap files which will suite all of the hardware and software version out there for the 2.0 8v. If Custom Code have spent a lot of time on R&D whith there files then the price will reflect this.
Nick
EDIT:
In Fact just to ad to this. There is an option for a mk4 2.0. 8v with a Bosch ME7 ecu which is much the same as the ME7.5 in the 1.8t, but I have only ever come across siemen ecus