No, just edit /boot/grub/menu.lst . Google the file, and there should be several tutorials on how to add a new kernel to boot.
I'm not sure, however, if that file will be edited during the Fedora installation process. THAT you might want to watch. I'd reccomend backing up the file to an external source (USB stick, CD, floppy, web based email) before you toy around, so that you can restore GRUB if all else fails...