I have a 6-core, a 4-core, two 2-core's and 1 single core, they all work great on siduction's (towo's) kernel. What is the problem you are having it ?
Although it is your system and your free to use what you want, you are out of scope for support and on your own using that kernel. Best support would be at his (damentz) forum.
Learn about 40_custom (/etc/grub.d) for your "grub" problem, that's about all the support you'll get from me.