[CentOS] recompiling kernel for centos 4.2 x86_64

>> Guess what ? Your custom kernel is also unsupported.
>
> But my changes will be minimal and can be easily documented/explained
> to management.  If it shows up with unsupported in the name, a lot of
> people will be alarmed.  I wish we could call it something else --
> perhaps "plus" or "extended" instead of "unsupported".

Get the src.rpm, install it, edit the spec, rebuild.

Wrinse and repeat,
MaZe.