cd /usr/src/linux
(cp somewhere/.config ./)
(make oldconfig)
make menuconfig
make clean dep bzImage modules
make modules_install
cp arch/i386/boot/bzImage /boot/vmlinuz-2.4.xx
cp System.map /boot/System.map-2.4.xx
ln -s /boot/System.map-2.4.xx /boot/System.map

vi /boot/grub/menu.list
grub-install