Factory Reset; Leopard to Snow Leopard

[Fontano]

I am selling my 2 year old iMac.
It came installed with Leopard 10.5, and I have the original DVD's.

I recently (about a month ago), upgraded it to Snow Leopard.

I was looking at this site:
http://www.macosxhints.com/article.php?story=20090805215651603

To get some ideas on how I can completely reset the system, to almost a factory install.

Would I have to follow the steps to a full system install of Leopard, and then install Snow Leopard upgrade? Or can I use the Snow Leopard disk, to directly install that version as the clean install?

At the end of the process, I would love to leave the system as "new" as possible.

 

[MacDawg]

You can use the SL disc for the install
But the SL disc should also go with the computer
Otherwise you should install Leopard from the original discs

 

[greg400]

Here's how to clean install Snow Leopard without using Leopard: http://www.youtube.com/watch?v=YjqaH6h0JVI

 

[Salmar]

Great video Greg and very comprehensive.