Backing up the MBR before a Windows XP reinstall?

*gasp* I need to reinstall Windows XP on my dual boot system (XP, Suse 8.0 Pro). Please no flames, I need the best of both worlds. After I reinstall Windows XP I know Microsoft will hose my MBR. Can I back this up easily and restore it after I install XP easily without headaches, or will I have to re run lilo for some reason? Can anyone suggest an easy MBR backup util? Thanks!