How do i update the kernel?

[klerg]

I've installed Knoppix as a Debian-type on my HD. Now, i've found out the kernel does NOT suit my needs (i.e. music composing). For instance, when i run the Rosegarden sequencer, i get an error " System timer resolution is too low." This makes composing MIDI off-beat & jittery. I want to replace the default kernel with one that solves the above problem and has real-time preemption, too. How would i do this? Is there some way to patch the kernel, or what?

[klerg]

I'm assuming i need to re-compile the kernel, but i'm not sure how to proceed on that. Does anyone have some pointers?