Okay, I downloaded the kernel version 18.104.22.168, configured, built it including the modules and installed the modules and created the linux binary image. Also created the initial ramdisk file and stored them in /boot directory just like for the other kernel versions. I pretty much followed the steps posted in this website
. But when I try to boot to that kernel version I get the error
Error 15: File not found.
I have it set up exactly the same way as I had for the other versions; just changed /boot/grub/grub.conf to add in the new version. So I am stumped yet again by the great linux machine, and no idea where to go.