multi boot question

I'm running win98/winxp home/ and mandrake linux.
Got each operation in a separate primary partition.
I use the Linux LILO menu to boot up.
I installed LInux several times trying to get it right.
Now on the startup menu I have multiple entries for the same operating systems. I think it has them like win2 oldwin etc.
It boots into all three systems fine now but I would like to clean up the boot menu.
What file do I edit to clean up the extra references to the operating systems?
I think the bootloader is on hda which is my 98 partition. That was the only place I could put it to get it to work ok.
Any Ideas?
ANy help would be appreciated ....