you will need
MICRO USB CABLE
USB DRIVERS Hotfile.com: One click file hosting: SAMSUNG_USB_Driver_for_Mobile_Phones_v1_3_2300_0.zip
ODIN Odin3-1.7 - Download - 4shared - Humberto Borba
galaxy S1 Pit FILE s1_odin_20100512.pit - download now for free. File sharing. Software file sharing. Free file hosting. File upload. FileFactory.com
FIRMWARE
Hotfile.com: One click file hosting: I9000XXJVU_I9000OXAJVU_OXA.rar
(password: samfirmware.com)
procedures:
set phone to download mode
option 1 (hold volume DOWN + POWER)
option 2 (or connect phone to usb then hold volume down anf finally insert battery)
make sure you have USB DRIVERS installed
then OPEN ODIN FLASHER and follow the IMAGE BELOW
NOTE IF YOU CAN'T SET download mode do this
POWER OFF PHONE
DO NOT REMOVE BATTERY
insert this cut cable AND THE PHONE WILL set download mode by itself