Izod speaks sooth.
You will need to learn how to set up a menu.lst file. The good news is that it's not hard.
Some of the distros insisted on setting up their own new Grub folder - Mepis was one of those. In the end I sorted it by putting a menu.lst on each partition with a Linux distro on it. The knack lay in finding out which partition was the real Grub boot one. With the same menu.lst in all of them, it doesn't matter.
If a new distro changed the one already there, I could edit the relevant bits of it and put that into the "common" one.
The format of the instructions in menu.lst is slightly different for different distros - if you want a copy of mine, say the word and I'll post it here or e-mail it. It covers Debian (stable and unstable), Fedora 7, Mepis, Kubuntu, SuSe 10, Slackware, and Windows XP.