Disk Uitility - Erasing Macintosh HD

Well I bought a imac g5 on Craigslist & managed to change all passwords w/ the snow leopard CD since it was password protected.

I'm not sure if the CD I have is the upgrade version or full version. Question is if I boot from the CD and use Disk Utility to erase Macintosh HD will this still allow me to reload the operating system after I erase everything? Or will erasing Macintosh HD w/ the disk utility disable the computer and not allow me to load any operating system.

spinnerlys said:

You can erase all you want, the SL DVD will allow you to install SL even without any previous Mac OS X version detected.

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Thanks! What an Life savor!