Felipe, I'm not sure if the eMotion "absolutely" needs the reference files stored in the back, but this is what I had to do when restoring the files for an Eyelike M11.
What I was asked to do is to insert the CD into the computer, and connect the back for tethering. After the back was recognized, it asked for the location of the reference files. I pointed it to the CD, and it installed without a hitch. This was for CapturePro software, but I'm guessing the procedure would be the same for CaptureShop or eXposure as well.
I never used the back on another computer, so YMMV. And of course, Thierry knows Sinar best.
Cheers,
Kumar