To configure LILO to boot the new kernel, you have two options.
The first is to overwrite your existing kernel -- this is risky unless you
have some kind of emergency boot method, such a boot disk with this
particular kernel on it.
The safer option is to configure LILO so that it can boot
either the new or the old kernel. LILO can be configured to boot the new
kernel by default, but still provide a way for you to select your older
kernel if you happen to run into problems. This is the recommended
option, and the one we'll show you how to perform.