Re-installing Windows 7 on a dual boot system with Fedora

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http://unix.stackexchange.com – At present I have a dual boot system with Windows 7 and Fedora 14. I want to re-install windows 7 but most probably it will replace Fedora's boot loader. I have a lot of things set up on Fedora. I want to keep these things intact. In other words, I want to make an image of my present Fedora system, re-install Windows 7 and have my Fedora system retain the exact state it had before re-installation of Windows 7. Can any one discuss the procedure to achieve this? (HowTos)