With some troubles ahead if you're not used to it, this is the procedure i recall of my memory, how it was done 10 years ago
Keeping the windows boot loader:
1) Install windows
2) install linux, bootloader to either / or /boot (anywhere, but NOT mbr-default)
3) before rebooting!! switch to a virtual console, and use this command:
dd if=/dev/sda5 of=/tmp/fedora_mbr.bin bs=512 count=1
Of course, sda5 should be where your grub loader is installed to. Wheter that may be / or /boot.
4) Copy the the bin file to a fat partition, usbstick which is readable by windows, preferable, you have the windows C: mounted somewhere and copy it there.
5) boot windows, and add a line there similiar to (remember, as i recall, 10 years ago) C:\f16_mbr.bin="Linux Fedora"
Do at your own risk, search google previous to verify the boot.ini line.
Hope this helps.
10 years ago, i think it was lilo not grub, dont know if that matters.
DO NOT DOUBLE POST