help with /boot inside lvm2 and grub2

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http://forums.fedoraforum.org – I had a drive going bad so I wanted to remove the drive from the lvm but this drive also was where /boot resided. So I followed this tutorial I found on fedora forum http://forums.fedoraforum.org/showthread.php?t=264174 but tried to have the /boot added on an already existing lv instead of a new lv called lv_boot in the tutorial. So now I can't boot. Tried using a live cd and created the lv_boot but am unable to get grub2 to work. When I enter the command grub2-mkconfig -o /boot/grub2/grub.cfg errors out because I'm in a live cd environment with the vol groups mounted. I have even tried superg (HowTos)