The hardware to map OEM efi stuff is extremely expensive and will stand you at over £30K to correctly and successfully map most of todays OEM EFI systems due to the security added in by teh manufacturer to safeguard his systems and teh engine.

Cossie stuff was tailored years ago to be done with very simple idiotproof dos software and thus, everyone and his dog has a copy of the Pectel IEMS software.. lol