Unable to remove windows partition

Hi:
I want to remove my windows/boot camp partition to free up space on my hard disk. When I launch Boot Camp Assistant to accomplish this, it gives me the error message, "The startup disk does not have enough space to be partitioned. You must have at least 10 GB of free space available." Well, thanks for the warning, but I want to REMOVE the partition and thus increase the available space on my startup disk. But Boot Camp Assistant will not allow me to advance futher, and I'm forced to quit. Ideas?

David Anderson wrote:
No one has any ideas on this? Is it simply a case of terrible user interface design?
I have attempted to use Disk Utility to accomplish this task. It allowed me to delete the Boot Camp partition from my drive, but will not allow me to expand the Macintosh HD drive to use the entire hard disk. I keep getting the error message "Disk Utility was unable to verify the partition." I suspect this is because it was a Windows-formatted partition.
I have also deleted enough files from my drive so that there are 22 GB available, but Boot Camp Assistant still claims that I have fewer than 10GB available on the disk, and therefore refuses to show me the partition removal screen.
I'd appreciate any help that people might have.
Disk Utility is the wrong tool to use, it can (and will) cause problems. Backup your entire disk, erase and then restore it.

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