How do I add it without messing up my current Linux set up. I'm looking for menu.lst samples and any other tips about protecting or safely restoring my MBR

I currently have:

# Modified by YaST2. Last modification on Mon Oct 18 01:26:01 2004


color white/blue black/light-gray
default 0
timeout 8
gfxmenu (hd0,0)/boot/message

###Don't change this comment - YaST2 identifier: Original name: linux###
title Linux
kernel (hd0,0)/boot/vmlinuz root=/dev/hda1 vga=0x31a splash=silent desktop resume=/dev/hda2 showopts
initrd (hd0,0)/boot/initrd

###Don't change this comment - YaST2 identifier: Original name: floppy###
title Floppy
root (fd0)
chainloader +1

###Don't change this comment - YaST2 identifier: Original name: failsafe###
title Failsafe
kernel (hd0,0)/boot/vmlinuz root=/dev/hda1 showopts ide=nodma apm=off acpi=off vga=normal noresume nosmp noapic maxcpus=0 3
initrd (hd0,0)/boot/initrd

###Don't change this comment - YaST2 identifier: Original name: Slackware###
title Slackware
root (hd0,4)
kernel /boot/vmlinuz root=/dev/hda5 ro hdd=scsi
savedefault
boot

Did you even try googling how to do it? I just ran a google search on grub "Windows XP" and right away came up with this.

label whatever
rootnoverify(hdX,Y)
makeactive
chainloader +1