Here are the steps I had to follow in order to install NVIDIA non-free driver for my laptop (Lenovo T61P-NVIDIA Quadro FX 570M).
As the 4.0-RC2 could not launch any X session on my laptop, I did the following:
0) download from NVIDIA web site the file <NVIDIA-Linux-xf86-295.20.run> and store it on an accessible partition,
1) installation of slitaz 4.0-RC2-base, on a free partition,
2) reboot and login as root on terminal (TTY1),
3) install the following:
#tazpkg get-install slitaz-toolchain
#tazpkg get-install ncurses-dev
#tazpkg get-install perl
#tazpkg get-install linux-source
#tazpkg get-install xorg-server
4)get the linux sources (thx bellard)
#get-linux-source
5)run nvidia script:
#cp /whereitis/<NVIDIA-Linux-xf86-295.20.run> /home/tux
#chmod +x /home/tux/NVIDIA-Linux-xf86-295.20.run
#./NVIDIA-Linux-xf86-295.20.run
=> answer the questions (quite straight forward)
6) load the modul:
#modprobe -v nvidia
7) start x session:
# /etc/init.d/slim start
8) enjoy it! :-)
Cheers.
PS: if a dev guy could do a package for it, it would so great.