What bootloader are you using (grub or lilo)? You need to add an entry in the bootloaders configuration file for Windows. For lilo, add this to the /etc/lilo.conf file (as root of course, w/ any text editor):
other=/dev/hda1 #Here it is assumed that Windows is on hda1
Run lilo as root to apply changes.
Snoop around in the /boot directory for the menu.lst file (that's an L in lst). I think it's /boot/grub/menu.lst for SuSE, but I'm not sure. Once you find the file, add this:
title Windows XP
rootnoverify (hd0,0) #Once again, assuming hda1 (in grubeese). 'rootnoverify' is for filesystems not recognized by GRUB, like NTFS
chainloader +1 # With a space before the +
No need to run anything to apply changes in GRUB.
To 'get into' the partition from Linux to look at stuff, you mount it (as root for now), using the mount command. This assumes that the Win partition is hda1, and that there is a folder called /mnt/hd. Enter the command in a terminal or in the 'Run Command' dialog in KDE. Terminals are better because you get to see what's going on (like if there's not /mnt/hd).
mount /dev/hda1 /mnt/hd -t vfat
mount /dev/hda1 /mnt/hd -t ntfs -o ro
Note the 'ro' for read-only. Linux doesn't write to NTFS well.
Look in /mnt/hd for your Windows stuff.