Tip :

If you get " configure: error: C preprocessor "/lib/cpp" fails sanity check" while compiling package; after installing NVIDIA Driver; or you screw up somewhere;it means that your kernel headers are missing from /usr/include. To repair this just simply run as SU :

cd /usr/src
rm -f linux
ln -s linux-2.6.6 linux (you can change to whatever kernel you use)
cp /boot/config-2.6.6 linux/.config (answer no to overwrite)
cd linux/include
ln -s asm-i386 asm

Done.[/b]