I reply to myself, maybe some other is interested to know..

I finally have sound with a simple solution: I take back (from a snow leopard installation) 2 kext:
applehda and voodoohda. Run kext utility and.. sound!

I have tried that before, but I was using the extra folder, so do not do that. Put the 2 kext on system/library/extension.

Concluding, now I have 10.7.2 full working, sound and sleep too!!!

Hope to help some one.. bye to all ;o)