Don't link to sites that promote piracy.
To answer your question, if you hotswap it you don't have to worry about unlocking it manually and then re-locking it.The Art Of Hotswapping
Hot swapping is the act of allowing the xbox to unlock the hard drive, so that you can gain access to it, by connecting it to a PC or Another Xbox. It involves removing the IDE ribbon from the Drive, while it is power on.
Do you need to have the EEPROM.bin or HD locking key?
NO, this is basically the reasoning for hotswapping. You are allowing the Xbox to unlock the hard drive for you, and then swapping the cable, so it will not lock until a reboot signal is received or power is lost.