Thank you for answering.
I get stuck with step 7 !!!
I tried with my old kernel and with my new kernel (the one I compiled) and either way I get
UNABLE TO DETERMINE NVIDIA KERNEL MODULE FILENAME
I looked in /var/log/nvidia-installer.log but I saw this same message as ERROR no detailed info....
If I didn't compile kernel well, maybe that's what's wrong ?
But why do I get the exact same ERROR with both kernels ?