win reinstall - restore grub

hi all i have a dualboot comp : suse 9.1 and win xp and i'm planing to format and reinstall my windows partition (hda1) becouse it's buggy and i got viruses. i beleave that windows is going to destroy my grub loader, so i would like to know, how do i restore it back after the instalation is complete. btw : i don't have floppy drive anymore, so creating boot floppy isn't a option. tnx for answers