Grub not found

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http://forums.fedoraforum.org – hello people , Thank you in advance for your replies. i had two operating systems , windows 7 (ultimate) & fedora 16 working in my system . Recently windows 7 had crashed and I formatted the /dev/sda1 drive and reinstalled it in the same drive.But when the system starts it directly boots windows 7 without the grub boot menu and am not able to use fedora . /dev/sda1 - acts as c: drive /dev/sda2 -acts as d: drive /dev/sda3 - acts as e: drive /dev/sda4-extended drive into sda5,sda6,sda7 for fedora i tried puppy linux -->grub4dos ,grub config but all went in vain...how to b (HowTos)