Hello!
I'm not very good with Multiboot. I don't mess with it because it just works great!

How do I install another kernel that is not available via apt-get?
I have the kernel on my mac, but I only know how to install and reinstall kernels on Multiboot via apt-get.

I want to install Ubuntu on Partition 3, but not sure what to put in the multiboot.item and where to place the Ubuntu kernel?

Thank you!