PresidentEvil

I'm interested in trying this even though i don't have a flash cart or second AR (I couldn't care less about typing codes in AR lol) but I have a few questions. 1. By loss of USB, do you mean the computer's USB port won't work or only the AR Code Manager will stop working? 2. Can you type new codes manually on the AR DS menu (not the Code Manager)? Thanks in advance.