hmmm ok that got me a little further along. It will now pop me into the configuration wizard, but after I select the proper resolution it goes to make that adjustment and never makes it back. The machine hardlocks at this point. Has LinuxMCE been tested with the Nvidia 9631's before? Something is going quite horribly wrong I am afraid...
About the nvidia-glx package: The system is running with the assumption that runs on a clean/default ubuntu linux. I think it would be better for you to create a deb package named nvidia-glx that contains your hand made nvidia glx modules/libs, This way would be easer for you and us
Black screen in AV Wizard: This means that your display in not supporting the signal that comes out of the video card. You can press 'ESC' of way 15 seconds and that it'll drop you to the previous good resolution again.
If you kindly make a donation i will promise that i will personally test the nvidia 9631 cards before the next release
. I don't have one so if you are able to see what is the exact problem and maybe come with a fix it would be very helpful.