Multi-Boot Help Needed

[4real*leb]

Hello, I have recently been trying to get a quad boot situation to work. The operating systems are; Vista, XP, Ubuntu 8.04 and openSUSE. The problem is that I cannot boot into openSUSE. I am currently using the vista bootloader, however I would like to switch to GRUB and configure it for my situation. Does anyone know if this is possible and if it is, how?

[Kevbert]

I reckon it's possible if you've got two hard disks. Firstly I'd install XP followed by Vista via the method here on one hard disk: http://apcmag.com/how_to_dualboot_vista_with_xp__stepbystep_guide_wi th_screenshots.htm
Next I'd install openSUSE on the second hard disk, followed finally by Ubuntu.
I believe you need two hard disks as you can only hard a maximum of three OS on a single one due to the partition limitations of linux (I may be wrong, but have only been able to install a maximum of three on a single drive). Ubuntu is best installed last as when grub is installed it should recognize all the OS (if not you can always use a SuperGrub disk see http://www.supergrubdisk.org/).
I've got WinXP on one drive and Fedora, Kubuntu 8.04, and Ubuntu 7.10 on the other.
Good luck.

[4real*leb]

I reckon it's possible if you've got two hard disks. Firstly I'd install XP followed by Vista via the method here on one hard disk: http://apcmag.com/how_to_dualboot_vista_with_xp__stepbystep_guide_wi th_screenshots.htm
Next I'd install openSUSE on the second hard disk, followed finally by Ubuntu.
I believe you need two hard disks as you can only hard a maximum of three OS on a single one due to the partition limitations of linux (I may be wrong, but have only been able to install a maximum of three on a single drive). Ubuntu is best installed last as when grub is installed it should recognize all the OS (if not you can always use a SuperGrub disk see http://www.supergrubdisk.org/).
I've got WinXP on one drive and Fedora, Kubuntu 8.04, and Ubuntu 7.10 on the other.
Good luck.

Thank you for the reply. There is something strange though. When I install openSUSE, Ubuntu does not detect it as openSUSE (nither does supergrub) but just as another partition. I cannot boot into it, even if I use supergrub. So I will uninstall Ubuntu, install openSUSE, and then reinstall Ubuntu as you suggested.

[Kevbert]

This post may also be of use: http://ubuntuforums.org/showthread.php?t=539417

[4real*leb]

Thank you KevBert, your first suggestion worked (reinstalling the os's in that order). I currently have all of my os's working.