[arch-releng] LiveCD kernel?

Hi, I'm new to the list. I was wondering how the kernel was built for the LiveCD. I am trying to build my own livecd based off of Arch's (with Squashfs LZMA), and thus need to patch the kernel to support it. I have tried searching, but neither Larch nor ArchISO have any info on this, and there is no documentation on the official CD that I could find. Thanks, Smartboy