Oh well, I got it. These are the basic steps I found to work with Fedora:
Set up the old drive on the new PC, of course. Boot up another install on it, live media or otherwise. It must be new enough in relation to the install to be recovered, so for example, no 2.4 for recovering Fedora. I had an unused partition so I installed an old version of Fedora on it, same version being recovered.
Once up and running, mount the partition to be recovered to /mnt for example, full read and write
mount -t proc proc /mnt/proc
mount --bind /dev /mnt/dev
mount --bind /sys /mnt/sys
chroot /mnt /bin/bash
mkinitrd -f /boot/initrd-[kernel-version-applicable].img [kernel-version-applicable]
Last edited by Q..; 09-28-2008 at 10:41 PM.