I am using  Pheonix with phatk.  Perhaps I should look at a different miner.

If I were going to do this I would use something like puppy linux that would allow me to boot from a USB key and then remove the key.  I would also setup a cron job that would power down or reboot the computer Monday at 5am.  I have also heard of people PXE booting machines to do this kind of thing.  That would be ideal.  I would agree with others that you are stealing power from your employer if you don't have their permission.

It is a pipe dream but I wish one could buy electricity for a stable price.  It would really help people understand how much mining costs.

Did you finally receive your purchase?

The challenge about unlocking the version of the card that I got in the mail is that the flash chip needs to have write protect disabled.
Adapted from this: http://www.techpowerup.com/articles/overclocking/vidcard/159

I don't run Windows on my mining rig.  If you do things are much easier than what I did.  This is about what I did, not necessarily the easiest way for you.  I use ATIFLASH in DOS, you can use whatever flash utility you want.  You will also need RBE (which requires windows).  I use mac/unix so I made a bootable USB drive with an UBCD iso and UNetBootin (http://unetbootin.sourceforge.net/).  On that flash drive I made a directory called ATI where I installed ATIFLASH.  For RBE (http://www.techpowerup.com/downloads/Utilities/RBE/) I used a Windows virtual machine on my Mac.

The basic process is this:

Boot into DOS download the flash from the card:

ATIFLASH -s 0 A0-ORIG.ROM

(change 0 to whatever position your card is in)

Then in windows use RBE to unlock shaders; save the ROM as A0-UNLCK.ROM

Jumper pins 3 and 8 on the flash chip.  Someone on IRC pointed out that I should use a pull up resistor.  Well I am very lazy and I wanted to leave the mod in place so this is what I did.  I got a circuit writer pen (http://www.amazon.com/CircuitWriterTM-Precision-Pen-silver-based-grams/dp/tags-on-product/B0002BBVQO) from Radio Shack.  I covered the top of the flash chip with a regular pencil (like the ones you use to take a scantron test).  I then used a dab of circuit writer pen to connect pin 3 and 8 to the top of the chip.  The graphic from the pencil acted like a resister.

There is discussion about identifying the chip and the correct pins here: http://www.techpowerup.com/forums/showthread.php?t=146951

I then booted back to DOS and use ATIFLASH to write the modified BIOS back to the card:

ATIFLASH -p 0 A0-UNLCK.ROM

I have had mixed results.  The first board I did went well and it has a stable 303MH/S with 840 OC Core (I know people go much higher than this but I am running this at 45C ambient.  The second card doesn't maintain a very stable hash rate.  This may be caused by me trying to flash the card without the cooler attached.  I may have damaged something.