Theres a few threads on this but anyway, a quick guide:
Make a boot disk in suse, if you dont know how search the forums or use 'apropos boot disk' or similar
Change bios to boot from cd and boot xp cd > recovery console
Type 'fixmbr', now you have windows and no linux.
Now change the bios to the floppy, boot suse from the floppy and reconfigure the bootloader.