Ok, just a bit late I resume the post to describe my situation.
1) The plugins (W836x.kext etc.) are included in SuperIOFamily.kext package and not in FakeSMC.kext, so I decided to drag the folder to the trash.
2) After this deletion I successfully installed the new version of FakeSMC.kext from Multibeast 5.1.3, with no plugins. Rebuilt the cache and then rebooted, but my system hangs with 'failed to locate smc driver'.
3) I restored a working OSX 10.8.2 from Time Machine.
4) I made a further attempt deleting the plugins (W836x.kext etc.) included in SuperIOFamily.kext package. This time I installed the new version of FakeSMC.kext from Multibeast 5.1.3, including the plugins, but the installation failed as usual.
5) I decided to recover the plugins from the trash associating them to SuperIOFamily.kext package as in origin, such that I'm exactly at the starting point again.
Do I have to surrend definitely?
Bye Rommy