krazy bon 3 i had the same issue only difference is that i did not remove my hard disk or anything before i installed FC2, but i have been trying to install different type of bootloaders. I had windows 2000, win xp , FC2 and MDK 10.0 so do not panic. I will work with you to get your MBR fixed and get all the OS that you have come up from your bootloader.
First tell me how many hardrive do you now have. In order to find this out you need to boot from the installation disk (assuming that you have the installation disk with you) and go the rescue mode. go to command line and type fdisk, it it does not recognize fdisk command find where your sbin is located type" /sbin/fdisk -l" you will get the map of your hard drive lets start here.
Once you have this and when we know your hardrive partition information. You can start grub in command line and try to restore your MBR from there and get all the OS working.
there are two links that helped me really understand the way GRUB works
if you need to hide or unhide a partition use the commands below
grub> unhide (hd0,0) (hd0,0 - your first disk and first partition in machine)
grub> hide (hd0,1) ( hd0,1 - your first disk and second partition )
The following set of commands will let you bring up windows back again if it is installed in your 1st hard disk 1st partition.
grub> rootnoverify (hd0,0)
grub> chainloader +1
Hope this gives you a start