Hello!
I'm currently using GRUB 0.98 (NOT GRUB2) on my PC.
How can I add Windows & Visopsys.

Windows is on "sda6", and Visopsys is on "sda7".

How do I add these to GRUB?

Try next grub 0.97 CentOS 5 config:

It may be hard, because windows xp needs to be on a primary partition.

What? Windows has to be the top partition? Or just I just need to change it to "Primary" instead of "Logical"?

If windows is not on the first partition on the first disk will have to add map lines to grub file. Down toward the bottom of this link for grub tutorial tells how.
http://www.linuxquestions.org/linux/...ROUBLE_SHOOTER

1 members found this post helpful.

You can have up to four primary partitions per h/d. If windows is not put in the first primary then you have to map it to make it think it is. Windows still needs to be in a primary partition.

Linux on the other hand does not care, it will work in primary or logical partitions.

The map command is for drives, not partitions. The entry below has rootnoverify for drive two, partition one on Grub Legacy. Note the map commands only refer to drives.

title Windows XP
rootnoverify (hd1,0)
map (hd0) (hd1)
map (hd1) (hd0)
chainloader +1

Take a look at the link below, scroll down to DOS/Windows section for more info.
http://www.linuxselfhelp.com/gnu/gru...er/grub_4.html

Windows filesystem/OS does not need to be on a primary partition but its boot files do. You can install one windows OS on a primary and another on a logical but the boot files will need to be on the primary. You could also create a small boot partition on a primary where you can install boot files. Google "boot windows from a logical partition" and you will get lots of sites with detailed information.

Thanks for correcting me, it has been too long since I worked grub over with a couple of window installations.

You need to hide the partitions that you do not want to boot.