Originally Posted by spalek83

That graphics string is built only for my specific graphics card. You would have to make an efi specific to your card. http://www.kexts.com/view/91-efi_studio..html
you would not be making a graphics efi if you are using a graphics injector (natit, nvenabler, so forth)

Besides that,

the default partition specified is probably different then yours
the name of the kernel specified is probably different then yours (you could rename your kernel to mach_legacy so that it doesn't get overwritten when using software update)
and the resolution would need to be changed to what your monitor supports, like you said