I been around this scene for quite some time now and i wrote also some error tutorials (use search). The only way i once fixed a locked drive into a unlocked drive was that i 1st brought the locked drive back to the shop[ i bought it and said it didnt work. Then they gave me a new drive. And voila it worked.
No serious, i tried everything described everywhere and it just does not work.
Theres absolutely no way to unlock a locked drive without the eeprom or hddkey.
GET OVER IT Most of the times it only is 8 or 10 gb. IF you wanna buy some locked drives As in more than 20, PM me.