lilo replaces GRUB when installing new kernel

[Daniel Stojanov <s3107265@student.rmit.edu.au>]

my current kernel is 2.6.8-2-k7, the original sarge dvd1

apt-get install linux-image-2.6.16-2-k7
gives the following output

*****************************************************
Reading Package Lists...
Building Dependency Tree...
The following extra packages will be installed:
  busybox-cvs-static klibc-utils libhtml-template-perl libklibc
  libparse-recdescent-perl libvolume-id0 lilo linux-source-2.6.16 lsb-base
  makedev module-init-tools yaird
Suggested packages:
  libipc-sharedcache-perl lilo-doc mbr linux-doc-2.6.16 kernel-package doc-base
Recommended packages:
  libc6-i686
The following packages will be REMOVED:
  grub
The following NEW packages will be installed:
  busybox-cvs-static klibc-utils libhtml-template-perl libklibc
  libparse-recdescent-perl libvolume-id0 lilo linux-image-2.6.16-2-k7
  linux-source-2.6.16 lsb-base yaird
The following packages will be upgraded:
  makedev module-init-tools
2 upgraded, 11 newly installed, 1 to remove and 444 not upgraded.
Need to get 58.4MB of archives.
After unpacking 93.8MB of additional disk space will be used.
Do you want to continue? [Y/n] 
*******************************************************

i chose to not continue
the problem is that installing the newer kernel replaces lilo with GRUB

is this supposed to happen, i don't want to change GRUB for lilo