Change Bootloader?

[Cryosim]

I know how to change the Apple Logo, but is there any way to change special images like the lock on the Firmware Password?

 

[yjchua95]

I know how to change the Apple Logo, but is there any way to change special images like the lock on the Firmware Password?

It's not worth fooling around with stuff at the EFI/firmware level.

If you screw it up, Apple won't help you to fix it back for free.