This should work for you.
Install Dual-Boot of Linux Fedora 14 ('Laughlin') on a Windows 7 computer
Just remember to shrink your Windows partition to get this up and running.
I used this method to install Sabayon on my Windows Laptop.
But to be honest it would be best to start from scratch and install everything new, dividing your disk up how you would like and then install windows first boot to make sure it is working and then install linux. I allow grub to boot my windows partition.