Five operating systems is nothing to EasyBCD (most I tested was 8... but I know it can do more)
Fedora 7 (Make sure to tell Fedora to install GRUB to the bootsector of the Fedora partition and not the MBR)
BSD 5 (again, have it install the FreeBSD Loader to the bootsector of the BSD partition)
Once you've installed them in that order, your menu should look like this:
Earlier versions of Windows
Selecting the second option will give you a menu to choose which XP you want to boot.
Now in Windows Vista, install and run EasyBCD. Go to the Add/Remove Entries screen, and add a GRUB entry for Fedora and a FreeBSD Loader entry for FreeBSD 5.