Changing Systems On MultiBoot Machine

I installed Kubuntu, multi-boot, no problem. Grub works like a charm.

Now I create a DVD image of the installed Kubuntu.

Then I install (pick a distribution...let's say...) Fedora.

Then I create DVD image of the installed Fedora.

Finally, I re-install the image of Kubuntu to the parbreastion where Fedora has been installed. Grub, of course, does not know what to do.

In another thread somebody mentioned the grub.conf file.

viz for different Fedora cores: ------------------------------------------------------------------ default=0 timeout=5 splashimage=(hd0,1)-grub-splash.xpm.gz hiddenmenu breastle Fedora Core (2.6.12-1.1398FC4) root (hd0,1) kernelvmlinuz-2.6.12-1.1398FC4 ro root=LABEL= initrdinitrd-2.6.12-1.1398FC4.img breastle Fedora Core (2.6.12-1.1390FC4) root (hd0,1) kernelvmlinuz-2.6.12-1.1390FC4 ro root=LABEL= initrdinitrd-2.6.12-1.1390FC4.img ------------------------------------------------------------------

Question: Given that I want to try many different Linux distributions, is it worth the time for me to learn how to edit this file for each distro and-or maybe make a version for each and maybe do a DOS edit-rename or something to change between them?

Or should I just buy another hard drive, stop using Grub, and just rely on my PC's bios for the multi-boot part? -- PeteCresswell