fedora has never supported upgrading and skipping a version
also from the RELEASE notes that you should have read
fedora went to gnome 3 in 16
so none of your gnome2 settings will work
also fedora 16 switched to systemd
boot is grub 2
fedora is NOT the same animal that 14 was
fedora is not even the same spices it change WAY too much
you DID back up your important data ? RIGHT ?
reformat to ext4 ( 16 uses ext4 for /boot now ) and do a clean new install
then move over your data from your back up .