[How To:] Fix the problem when XP doesn’t boot from GRUB

Intro : First, GRUB was erased. After fixing it, XP did not boot from GRUB owing to 'ERROR 12'. Lastly, How I could fix both, rather discovered work-around for some part. Recently I faced the first battle arising from the conflict between Windows and Linux. Thanks to Linux, I won it 🙂 .Let me give…