*** This is for GSM ONLY. Don't try it if your not sure or you'll brick your phone ***
This is what I did to get S-OFF...
Download Modaco's SPL HBoot 1.76.2007 and move it to your SD Card.
Download Clockworkmod Recovery 184.108.40.206, rename it to " recovery.img " and move it to your SD Card.
Download UniversalAndroot and move it to your SD Card.
Download ES File Explorer from the market (or any other file explorer).
Download Android Terminal Emulator from the market.
Enable installing from SD Card.. (Settings -> Applications -> tick Unknown Sources)
Open ES File Explorer and install Universal Androot.
Run it and press Root :) ...
It should say.. "Woot ! Your device is rooted !" ... close the program.
Open Android Terminal Emulator, and type " su " . Press enter.
Allow SuperUser access.
Type " flash_image recovery /sdcard/recovery.img " and press enter.
It should just show a $ sign on a new line.
Power off your phone, remove and replace your battery and press and hold the Home button while pressing Power.
Your phone will load into Clockworkmod Recovery.
Select " install zip from sdcard ", then " choose zip from sdcard ". Select " update-hero-hboot-1.76.2007-signed.zip ". Press Back, Back and " reboot system now ".
Leave the phone to update HBoot. Do not interrupt it. (It restarts a few times)
Once done, the phone will restart and load as normal. Check the HBoot version by going into HBoot again (turn off, hold Volume - and Power) and it will hopefully show S-OFF, Hboot 1.76.2007. Job done.