No luck, I've activated restricted drivers and after the reboot (before running linuxmce install script) the KDE showed up with HUGE fonts.
I've tried to install the 177 nvidia driver but after reboot the KDE had the same font problem.
Then I ran the linuxmce installation script (even with the font issue) and when it finished everything on the screen was huge, the flickr images were so magnified that I could see only a part of the picture.
Then I activated openGL on Media Director webadmin page and LMCE installed the nvidia drivers (new hope) although when it finished I got a black screen, even after reboot.
When I install the Nvidia drivers manually the X window crashes at startup complaining on compatibility issues between nvidia module and Kernel headers (?!?). On version 710 I was constantly updating the nvidia drivers without problems.
This night I will try another from the scratch installation, maybe I will just activate the restricted drivers and start LinuxMCE installtion without rebooting the server.
If anyone remembers anything else please help.