How do I clean out my hardrive and prepare the tower for selling it?

I have a freind who's going to buy the tower from me; I want to completely erase and clean the unit so he can do a clean install as I did when I bought it.
Can anyone send me a link to the support page???
Anyone done this???

Hi, and welcome to the Discussions!
Boot to the install disc. When the Installer finishes loading, select and launch Disk Utility from the menubar. (If your using a Tiger install disc, select your preferred language first so you can get access to the menubar.) Highlight the drive on the left side of the Disk Utility window. Choose the Ersae tab on the right side, name the volume HD Mac, choose mac OS Extended as the format, click on the Options button (Security Options button in Tiger) and then check the box to overwrite zeros to the drive.
This will do two things: It will place zeros in each location on the drive, overwriting and destroying any data that may be there now. It also has the added benefit of mapping out any bad blocks which may have developed over time, preventing their future use and precluding them from corrupting data.
When the process is finished (which could take up to several hours, depending on the size of the drive), quit Disk Utility and commence the installation of OS X. When you get to the point where it instructs you to restart, just power down instead. The new owner will then be presented with the Setup Assistant when the Mac is next booted to OS X, allowing him to cleanly set up the initial admin account.
You can do this with the original install discs if you desire. Don't forget to provide your friend with a complete set of original install discs, to include the additional software discs, iLife, OS 9, and the Apple Hardware Test disc, if it shipped with these.
You can also just install Tiger, as above, providing him with the Tiger install disc and the original disc set as well.
Gary

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