[Grml] grml-live with custom kernel

I believe I have successfully built a grml kernel patched for hardware speech synthesizers. I need to get that into grml-live somehow. What I was thinking of doing was to create a local repository and then modifying the FAI configuration for grml-live to install the kernel from my local repository. Is there an easier way?

It looks like you can specify files to be copied to your custom grml image by putting them into a directory tree and then pointing the CHROOT_INSTALL parameter at the tree. But there is no easy way to add/remove packages like that, right?

I want to make it as easy as possible for me to make a new custom image whenever the grml development team releases a new version of grml.