well, if it's a new d10, it should be pre configured....but to be on the safe side, i'd take it to the friends house.....you only need to take one to make sure you get locals, once you get the 72.5 dialed in, the other should take fairly easy.....word of advice, depending on which 4x4 you are using, i'd bypass the switch when autodetecting....sometimes they can conflict.....also there is grounding problem on the d10 in which the transponders will jump around, if that's the case, get a 3 by 2 electrical adaptor and use it to plug into your wall or surge protector