Originally Posted by
pdxer
snow leopard will install onto a blank drive, however, it's a violation of the end user license agreement if you purchased the $29 upgrade version, which requires leopard to be already installed.
I didn't read the EULA, but I don't think Leopard is required to be preinstalled, just that you have to have a license. Slight difference, but could save someone a lot of time first installing Leopard then upgrading.