I just did this with Win2k and Grub this afternoon. If you are interested
look at the Dual Boot System.
This puts Linux on the boot menu of boot.ini and I have had no problems with it. He mentions a similar process for lilo but I cannot get to that page..
I would assume that you simly look at your lilo.conf file instead of the mentioned grub.conf. I created and mnt point and copied the linux.bin file straight to my c drive.
Hope it helps,