Adding a new scheduler to the kernel

Hi, I am trying to develop a modified version of CFS. After following several examples online, I am wondering two things. First, how do I add the new scheduler after the removal of .next in the sched_class? I have tried adding it to the SCHED_DATA in /include/asm-generic/vmlinux.lds.h. Is this the correct place or do I need to make more changes? Second, the modified kernel will compile without a problem but will refuse to launch in grub, is there any way I can debug it on an older working kernel or use other appropriate methods? As it stands now it will just show a black screen after "Loading initial ramdisk ..." . I do not get any further information after removing "quiet splash". Regards Jacob