sh /usr/src/linux-2.6/arch/x86/boot/install.sh 2.6.25-rc7 arch/x86/boot/bzImage System.map "/boot"
In order to use the new kernel image you have just installed, you
will need to reboot the machine.  First, however, you will need to
either make a bootable floppy diskette, re-run LILO, or have GRUB
installed.

Checking for ELILO...No

GRUB is installed. To automatically switch to new kernels, point your
default entry in menu.lst to /boot/vmlinuz-2.6.25-rc7
lily@vaio:/usr/src/linux-2.6$