i guess that the problem is the xorg.conf.
adding something like it in /etc/X11/xorg.conf may help :
Section "Device"
Identifier "Configured Video Device"
Driver "nvidia"
Option "NoLogo" "true"
EndSection
i've built an image which is supposed to be correct exception xorg configuration. but while i've not the correct hardware, somebody must take the relay and make test.
i don't think that the nvidia-* config binaries are requires. i will take a look at them, but i guess there are debian specific for debian and built by debian, not nvidia.