here is a more clear set of directions:
1. Download and install
samsung_usb_driver_for_moblie_phones_v1_4_6_0.
2. Connect phone to pc via usb.
3. Enable usb debugging.
4. Download and install pdanet on both your computer and phone.
windows 32-bit or
windows 64-bit
5. Download and extract superboot folder, place it on c:/ and rename it to "root".
download superboot
6. Power down phone.
7. Boot into bootloader(press and hole volume +/- simultaneously and power).
7a. On pc go to start>run and type "cmd" and hit enter.
7b. Type "cd.."(repeat until your at c:/)
7c. Type "cd root"
8. Type "fastboot-windows oem unlock" to unlockbootloader.
9. You'll receive warning about unlocking. Use volume + to highlight and power to confirm.
10. Click "install-superboot-windows.bat" that is in your "root" folder on c:/.
11. You should now have unlocked bootloader and root access.
Note: Phone will reboot and may take up to 5 minutes. If you get stuck at google screen past 5 minutes
do a battery pull. After it's booted check for superuser app and update(even if it says it's up to date).
Reboot after updating superuser app.
Done.