Building a kernel

cd /usr/src/linux
make xconfig
make dep
make 
make bzImage
cp System.map /boot/System.map.new
cd arch/i386/boot
cp bzImage /boot/vmlinuz.new
vi /etc/lilo.conf # add new kernel section
lilo # write new boot label
reboot
vi /etc/lilo.conf # change the default= line to the new image
lilo # write new boot label