Hi Fabio,
I believe the development of the Eyelike software has stopped. It is meant to be replaced by eXposure, but even after asking several times I have not had an answer to when (or if) it will occur. The next version of eXposure is due out in the second week of Feb, so maybe Precision backs will be supported in that version. Existing raw files are already supported, just not tethered shooting as far as I know.
In the meantime, Eyelike Capture Pro still works on my Intel iMac and Intel Mac Book Pro, so you should have no problems. I am talking about version 4.3.5.3, not version 4.4.6 which is for the eMotion backs. That doesn't work at all on my Intel machines - it crashes as soon as it's launched. I haven't tried it on my G5 PowerMac.
Ben