Hello,
I've got a little problem...i would like to remove my old kernel from my box. How can I do?Does anyone know a website where I can find instructions ? Thank you very much...lucs

Remove your kernel... Do you mean the source tree or the compressed kernel image? Or are you talking about the lilo menu?
Assuming you have another workable kernel, to remove the compressed image, look in /boot (or sometime / ) for a file named vmlinuz, vmlinux or bzimage. THis is your compressed kernel. Make sure you don't remove the good one!
About lilo... just make change to /etc/lilo.conf and run "lilo"
About source tree... source of the kernel are located in /usr/src usually.

Thank you very much!

If the old kernel is the default kernel, which means it's packed,
use removepkg to remove:
kernel-ide-KERNELVERSION
kernel-modules-KERNELVERSION
kernel-source-KERNELVERSION
alsa-driver-VERSION_KERNELVERSION

but if you have enough space, just leave it there, and just remove it from lilo or grub. You never know. Maybe you'll need it some day

If this is manually installed you need to remove
the kernel image from /boot
the source directory: /usr/src/linux_KERNELVERSION
and the modules directory: /lib/modules/KERVELVERSION

Hope it helps

what about the kernel-headers-KERNELVERSION package? Can that be removed or is it important to keep around? I've just installed 2.6.11.8 and I'm removing the default 2.4.30, I still have the 2.6.11.8 source in /usr/src

you can remove the source in /usr/src but the kernel header is a totally different thing... it's like something telling to your C compiler (gcc) what it can handle, it has very few to do with the kernel, so don't remove this (unless you want to install another one)