As I mentioned previously, you will need gPXE-1.0.1+ in order to boot your EFI based systems from network. another option is to get the live pxe version of Clonezilla and create an entry on your pxe menu which points to your Live Clonezilla. With this in place then you can upload/download EFI, EUFI, EFT, EXT, NTFS, FAT based file systems.