ppc32.img will not work for me ether. The only way that I can get it to boot is to copy the /ppc/ppc32/vmlinuz and /ppc/ppc32/ramdisk.image.gz to the boot partition of my harddrive.
edit the boot conf file (yaboot.conf or grub.cfg)
for yaboot
Code:
image=/ppc/ppc32/vmlinuz
        label=install
        initrd=/ppc/ppc32/ramdisk.image.gz
for grub
Code:
 menuentry "Fedora 11 install" {
        set     root=(ide,10)
        linux   /ppc/ppc32/vmlinuz
        initrd  /ppc/ppc32/ramdisk.image.gz
}
It boots fine but their is an error in anaconda "Unsupported PPC Platform" and the installer shutsdown.
There is an bug in the installer program (anaconda).
I also tried doing the preupgrade but the same thing happened.
 nels