[newbie] upgrading kernel

[Meg]

I'm currently using Mandrake Update to  upgrade my kernel from, I assume it's
2.2.13-17mdk to 2.2.13-22mdk, (correct me if I'm wrong) and when I select the
package, it "warns" me that I'd have to update /etc/lilo.conf manually.  Is that
something I should worry about? I'm really pretty new to this
and what changes am I supposed to make, if ever?

Meg