Nashlabs,
Backup all your stuff. Empty any one of your drives , other than the one which contains XP. I think you can use windows XP cd and partition the free drive into two [ One for 'ROOT' and another for 'SWAP' ].
Boot from windows XP cd, and press 'R'. You ll get the command prompt,type 'diskpart' and create two partitions from the free drive. 'swap' size can be from 500MB or so and leave the rest for root dir installation.
Next , you can use suse disk to format the newly created partitions and install suse