RVR X3 1998

Hi
I have a 1998 RVR X3 rallyart and I'm looking for options to tune the car or swapping the computer from an Airtrek into the car.
I have created xmls by studying differences between simular computers and the use of a hex editor and winols to create xml's for the engine but, I dont have a simular ecu to study to create a xml for the transmission.
The transmission and engine computer are combined in the same case with seperate 7202f h8/500 processors and they share inputs tps rpm etc...
Would someone have an xml for the transmission ?
can someone create an XML for me for the transmission if I pay some money?
Alternativly can I swap the ecu from the Airtrek into the RVR? it has a w4a51 transmission that is 4 speed not 5 like the Airtrek so it would need to be remapped to suit the RVR so it does not throw speed sensor errors as the ratios are different.
I believe the Airtrek has a fly by wire Electronic throttlebody can the airtrek computer work with a mecanical one ?
has any one done this is there wiring differences in the computers ?
Also I have flashed a evo5 rom to the computer to test and it runs the engine but the transmission runs in limp mode is there a way to tell why the transmission is in limp mode ? the EVO 5 rom has more features, bigger maps, asl etc... and i would like to run an evo 5 rom in the car is possible.
I have a 1998 RVR X3 rallyart and I'm looking for options to tune the car or swapping the computer from an Airtrek into the car.
I have created xmls by studying differences between simular computers and the use of a hex editor and winols to create xml's for the engine but, I dont have a simular ecu to study to create a xml for the transmission.
The transmission and engine computer are combined in the same case with seperate 7202f h8/500 processors and they share inputs tps rpm etc...
Would someone have an xml for the transmission ?
can someone create an XML for me for the transmission if I pay some money?
Alternativly can I swap the ecu from the Airtrek into the RVR? it has a w4a51 transmission that is 4 speed not 5 like the Airtrek so it would need to be remapped to suit the RVR so it does not throw speed sensor errors as the ratios are different.
I believe the Airtrek has a fly by wire Electronic throttlebody can the airtrek computer work with a mecanical one ?
has any one done this is there wiring differences in the computers ?
Also I have flashed a evo5 rom to the computer to test and it runs the engine but the transmission runs in limp mode is there a way to tell why the transmission is in limp mode ? the EVO 5 rom has more features, bigger maps, asl etc... and i would like to run an evo 5 rom in the car is possible.