I have installed Vector 5.9 Deluxe edition and installed Lilo on the root partition. I have grub on a multi boot system and just added title Vector 5-9
kernel /boot/vmlinuz root=/dev/sda14 ro
to the existing grub menu.lst file and all went well. I have used Lilo in the past and it never gave me any problems. I guess it is what you are use to using that makes it easy or not. When I started using Linux the only boot loader that came as default was Lilo and after a while I got use to using it. Now I am use to grub and don't have a problem using it, all though there is another one that I can't think of the name but Forsight Linux uses it and I can't at the moment get it to multi-boot, but if it becomes the standard I will put the time into finding out how it works.
Just my opinion