[lmz]

Yeah, but even then to change the default loader you'll need to point it to something else using some arcane bcdedit command. Dropping some PE binaries is not good enough.

[wolrah]

Or just boot in to the EFI config interface and set a new default that way.

[lmz]

Only if it's registered! Registering a new binary isn't usually in the customer motherboard menus.