/boot/vmlinuz shuold be a symlink to the kernel you want to boot. this way you may add a new kernel and make the symlink /boot/vmlinuz point to the new kernel. the nice thing about this is that you won't have to re-configure lilo to use the new kernel. if you do a 'ls -al' in your /boot dir, you *should* see something like this:
vmlinuz --> vmlinuz-ide-2.4.22
... (some other files)
when the control panel probes for the kernel, it just detects the real kernel file, not the symlink. (probing the symlink will result in the real kernel file too, as the probe follows the symlink).
.-=~ iluvatar ~=-.