Hello, everytime I update my Ubuntu kernel, another entry is created on GRUB. How should I go about removing some entries? I think I can edit the menu.lst file and remove them, but I want to make sure I do it right.
 
## ## End Default Options ##
 
title Ubuntu, kernel 2.6.15-26-686
root (hd0,2)
kernel /boot/vmlinuz-2.6.15-26-686 root=/dev/sda3 ro quiet splash
initrd /boot/initrd.img-2.6.15-26-686
savedefault
boot
 
title Ubuntu, kernel 2.6.15-26-686 (recovery mode)
root (hd0,2)
kernel /boot/vmlinuz-2.6.15-26-686 root=/dev/sda3 ro single
initrd /boot/initrd.img-2.6.15-26-686
boot
 
title Ubuntu, kernel 2.6.15-26-386
root (hd0,2)
kernel /boot/vmlinuz-2.6.15-26-386 root=/dev/sda3 ro quiet splash
initrd /boot/initrd.img-2.6.15-26-386
savedefault
boot
 
title Ubuntu, kernel 2.6.15-26-386 (recovery mode)
root (hd0,2)
kernel /boot/vmlinuz-2.6.15-26-386 root=/dev/sda3 ro single
initrd /boot/initrd.img-2.6.15-26-386
boot
 
title Ubuntu, kernel 2.6.15-23-386
root (hd0,2)
kernel /boot/vmlinuz-2.6.15-23-386 root=/dev/sda3 ro quiet splash
initrd /boot/initrd.img-2.6.15-23-386
savedefault
boot
 
title Ubuntu, kernel 2.6.15-23-386 (recovery mode)
root (hd0,2)
kernel /boot/vmlinuz-2.6.15-23-386 root=/dev/sda3 ro single
initrd /boot/initrd.img-2.6.15-23-386
boot
 
title Ubuntu, memtest86+
root (hd0,2)
kernel /boot/memtest86+.bin
boot
 
### END DEBIAN AUTOMAGIC KERNELS LIST
 
I want to remove the 386 ones, leaving 686 and memtest.