A question on RedHat kernel RPM

Hi,

I have a stupid question:

on my Linux box with RedHat 6.2 kernel 2.2.14-5.0 I must update the
kernel (2.2.19-6.2.16). On the site ftp://updates.redhat.com/6.2/en/os/
I find 3 directory : i386 i586 i686. Which is the right one for my Linux
box ? I have a Pentium III 450Mhz and when I load the operating system
there is the following prompt:

     Red Hat Linux release 6.2 (Zoot)
     Kernel 2.2.14-5.0 on an i686 


I think the correct one is i686 directory but inside that directory
there is only the package kernel-2.2.19-6.2.16.i686.rpm (the same on
directory i586). Only the directory i386 contains all the kernel
packages (kernel kernel-source kernel-utils kernel-headers etc.).
Which package I must download ?

Thank you

Giovanni