You are using the UUID of the volume in your com.apple.Boot.plist file right? Each of these is specific to a certain volume so they will need to be changed to match either the installer volume (on the flash drive) or the Hard Drive where you will be installing.

If you've used Chameleon on any of the drives I'd recommend repartitioning to MBR first, then partition back to GUID, then apply the EFI partition mods. This will get rid of the boot0 file being placed at the beginning of the Drive (not volume or partition, but the actual drive) from the old chameleon bootloader.

The external drive that will act as your installer does not need to have a specific name. I even went so far as to modify the Volume icon to reflect that this was still retail but with the EFI-partition mod (but thats just for fun because I'll only use it on my system). What's cool about the external flash drive is that I can use it to install to my macbook as well (I just have to use the "startup disk" feature in the system preferences because USB is not a target disk for the target disk mode... however if Firewire was used, it would be )

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