How to upgrade kernel on Fedora 9
Old kernel: 2.6.26.6
New kernel: 2.6.27.5
shell> cd /usr/src
shell> wget http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.27.5.tar.bz2
shell> tar -vxjpf linux-2.6.27.5.tar.bz2
shell> ln -s linux-2.6.27.5 linux
shell> cd linux
shell> make mrproper
shell> cp /boot/config-2.6.26.6-79.fc9.i686 .config
shell> make menuconfig
shell> make all
In this moment, coffee please 
shell> make modules_install
shell> make install
Review entries in /boot/grub/menu.lst
Reboot the system!
Enjoy!
