Karacho,
I read about your build and I was disappointed to hear of the OS freezing.
" 7th. Issues? Unfortunately yes...sometimes the System freezes, and I can't find anything about that in the logs"
This happened to me when running LION on my iMac (2008 20 inch with ATI Radeon 2600HD). And it's happening to many other Mac users. Even new machines with LION pre-installed are affected.
I was hoping that my Hackintosh would perform normally with LION because the hardware is very new compared to my iMac. But reading about your problem makes me feel worried. Do you know of many other Hack users that experience this freezing?