I have a dual-boot MBP on 10.5.7 and Windows XP SP3, running along quite happily. If I were to upgrade to Snow Leopard, would I need to repartition my drive and re-install XP, or would a 10.6 install leave my Windows-side alone? I would like to avoid having to reinstall Windows and my programs on there, so if SL erases other partitions then I may forgo upgrading.