Windows XP/SuSe 9.3 bootloader issue
 

I have Windows XP Pro (SP2) and SuSe 9.3 Pro installed on my computer. The bootloader I'm using is GRUB. When I try to start SuSe nowadays it won't start up correctly and I barely have use for it right now, so I was thinking of formatting the Linux partition on my comp with Partition Magic in Windows. The thing is that if I do that I will lose the boot "section" for XP. How do I recover that afterwards so that I can use XP?