Ressetkk, I am happy to say that my ML 10.8.3 finally has got sound, video 512MB Intel HD, USBs as 2.0 etc. etc. I do not know whether the fix was to use the 10.1 Retina smbios.bin, however I changed the settings via Chameleon Wizard and it fired up perfectly. It not only fired up, but also if I connect a tv, I can setup dual screening as clone or extension without doing any more tweaks etc.
The only things I have noticed so far are that the card reader does not work for me despite the fact that I have installed the IOUSBFamily.kext . I do not know is there anything else to set up in order to have the card shown or I should simply insert a card in the reader (as usual) and it will mount/show it straight away.
One other thing though was the fact that the notebook restarts after waking up from sleep instead of simply to bring me back to the login screen etc. Any ideas about how to fix that? I think I have read someone with a similar problem, however I cannot find it.
Oh, and one more thing I notticed which might be useful for the others having 0 experience or not feeling very strong (yet) about Mac OS X - using the step-by-step tutorial on page 10 lead me to lots of errors: Unable to load ..... kext, missing library dependencies and nothing was working technically the way it should but the battery meter. What I did as per someones advice in other forum was to install the latest Chimera (2.01 for now) and all the kext loaded perfectly as they should. The Chameleon provided in the archive (2.2.svn.. I think) did install fine, showed me the bootloader, but caused the problems with loading my newly installed kexts.
Well only the reader is left and the sleep and I should join the lines of the happy Mac users. Thank you Ressetkk and everyone else who have shared some or lots of knowledge and lead me to these results.