Yes, the instructions would be the same but you would naturally download and untar a kernel with a different file name. (Actually not always, sometimes the new kernel can still have the name as the old kernel)

(Just make the changes with the wget, mv and kernel_flash command). The kernel flasher will almost certainly remain the same.

If a feature doesn't exist in a new kernel you want flashed, then naturally, that feature will be gone.

That's why I wanted Fanoush to update his kernel rather than flashing the one at the original post.

Fanoush is great and usually includes the best stuff anyway.