Mac Disk Utility

I'm trying to use Disk Utility to make a disk image of the whole computer on my brand spanking new external HD for backup purposes. However, when I click "New Disk Image" or any version of that thru the File Menu, it says (roughly) "Unable to create image of ****. Resource in use." This sounds to me like it won't do an image of the same disk that Disk Utility is hosted on. So how the fuck do I backup my whole computer?

Bizarre

Next time you're in the mood for something bizarre, check out this Hello Kitty products fansite. Freaky.

Because you really need more timewasters,

Yahoo now has a service called Yahoo Answers. People ask stupid questions, you give stupid answers. Or good ones, as there's a point system to reward good answers. As far as I can tell though, the points you earn are only internally useful, so in effect, they're not at all. But it wastes time!