Reformatting External Hard drive: Disk Utility crashes near the end

I recently updated to Leopard and emptied off my external hard drive and then wanted to (zero out data &) reformat it and start fresh so as to use it with the new Time Machine feature.
However, near the end of reformatting it with Disk Utility the progress just stopped and after giving it some time I did a force quit and sure enough it came to light that it had crashed. Since then I've tried again several times to the same result. I even tried doing it of the Disk Utility on the install CD and it crashed with one minute left!!
Any help or advise would be greatly appreciated!

Use a more powerful utility such as DiskWarrior, or a product such as those listed here.
(108710)

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