lvm help

[charm_quark]

hi, i was/am trying to create an lvm,

so started by using this tutorial

http://www.linuxbsdos.com/2008/11/11/lvm-configuration-in-ubuntu-810/
but i was using ubuntu 9.*

but i suppose the configuration is the same, but i was having issues installing grub.. so i said screw it. lets copy the configuration if i asked IT to do it by its self
which are here below
http://i545.photobucket.com/albums/hh393/charm_quark/original1.jpg

i tried to copy them here
http://i545.photobucket.com/albums/hh393/charm_quark/mymake1.jpg

and i got this error,
http://i545.photobucket.com/albums/hh393/charm_quark/error.jpg

i later realized that they are not the same ( the yellow arrows are what i am referring to)

so does any body know what that is and how to change it!

Q 2) lets say I have finished installing the LVM, now i add an extra harddrive into the system , how do i add it into the lvm