Macbook not booting up so I resorted to Disk Utility...it has been stuck on "updating boot support partitions for the volume as required"

So my Macbook was not booting up so I resorted to using Disk Utility...it has been stuck on "updating boot support partitions for the volume as required" for over two days.
Has anyone else had to wait this long? 
I have read that I should leave it until I get another message but I saw this reply on another site....
"Hi everybody, the message: “Updating boot support partitions for the volume as required.“ means: the Disk Utilities is telling you what it is doing: 'Disk Utilities': "(I'm) Updating boot support partitions for the volume as required (& I'm done with it)." So when you see this message, the DS (Disk Utilities) is done & you can close the application"...
Any advice/tips would be greatly appreciated!

Doesn't have to be another MacBook - any Mac with FireWire (400 or 800) will do. FW 400 to 800 adapters or adapter cables should be available from any computer store.
Instructions for FWTDM -
Disconnect all other FireWire devices from both computers before you use FireWire target disk mode. Do not connect any FireWire devices until after you have disconnected the two computers from each other or have stopped using target disk mode.
To use FireWire target disk mode
    1.    Make sure that the target computer is turned off.
    2.    If you are using an Apple portable computer such as a PowerBook or MacBook as the target computer, plug in its AC power adapter.
    3.    Use a FireWire cable to connect the target computer to a host computer. The host computer can be powered on.
    4.    Start up the target computer and immediately press and hold down the T key until the FireWire icon appears. The hard disk of the target computer should become available to the host computer and will likely appear on desktop. (If the target computer is running Mac OS X v10.4 Tiger, you can also open System Preferences, choose Startup Disk, and click Target Disk Mode. Restart the computer and it will start up in Target Disk Mode.)
    5.    When you are finished copying files, locate the target computer's hard disk icon on the desktop of the host computer and drag it to the Trash or choose Eject (or Put Away) from the File menu.
    6.    Press the target computer's power button to turn it off.
    7.    Unplug the FireWire cable.
(extract from http://support.apple.com/kb/HT1661)

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