I just installed nvidia new driver (Version: 1.0-6106), but this time I used a different approach. The procedure:
1) To create kernel header
su
cd /usr/src
wget ftp://ftp.kernel.org/pub/linux/kerne...-2.6.6.tar.bz2
cp linux-2.6.6.tar.bz2 /usr/src
tar jxvf linux-2.6.6.tar.bz2
rm -f linux
ln -s linux-2.6.6 linux
cp /boot/config-2.6.6 linux/.config
cd linux/include
ln -s asm-i386 asm
cd ..
make oldconfig
patch -p1 <../knoppix-kernel26.patch
cd /usr/bin
rm -f gcc
ln -s gcc-2.95 gcc
cd /usr/src
make
(You can skip above procedure if you already done it before. I believe you should uninstall previous NVIDIA driver.)

2) Download NVIDIA installer
http://download.nvidia.com/XFree86/L...ings" utility.