I just finished building a machine ( my first build ever - from scratch ) based on the GigabyteG31M-ES2L and I'm having a hard time deciding on how I should approach installing OSX. I don't own Snow Leopard yet, but I do have a 10.6.7 install disc that came with my Macbook Pro. I'm assuming the Leopard disc I have is only good for one license, of which I am already using.

Is it possible to do a fresh install of Snow Leopard (the $30 'upgrade) without having to install Leopard first? I'd like to avoid shelling out another ~$130 for another copy of Leopard ( On top of the $30 upgrade ).

Most of the guides I've come across seem to require a previous installation, although this one makes me believe it is indeed possible.