Nashith rescued his Intel D945GCLF board using the Bus Pirate and flashrom:
Got myself a locked out PC a few years ago, boot restrictions done via bios. Stumbled upon Bus pirate and Flashrom and decided to give it a go. Seaboot works great and flashing the bios with the bus pirate worked on first try.
Via the forum.
Get your own handy Bus Pirate for $30, including world-wide shipping. Also available from our friendly distributors.