How to Boot up "Empire EFI Legacy" without the CD
First, Install "Chameleon bootloader" (Inside in the Empire EFI CD/Post installition folder) after that open "Empire EFI legacy CD" and copy all the files. (See image below)
and Paste them into "Snow leopard OS folder. (see image below)
after that just reboot and it will load your Empire EFI from your HD.
Note: In the "Extra folder" you can delete the "Post-Installation folder", it's up to you to leave it or delete.
I hope this can help you!