HELP!!!, need P1i trade germany GDFS

[Willin08]

NEVER mess up with the GDFS in PDA type phones. If you put another GDFS that is not original, say goodbye to your PDA.

You can try to use XS++ to put the CDA that goes according to your area.

[kobimic]

ok, but how do i change the cda right ,so it will validate.
because i read about the checksum but i dont know how to calculate it.

or maybe can someone help write me the GDFS script to change CDA into trade germany with the right checksum.

(my current CDA is WG1.)

TNX