The statement "As far as I understand"...is a diplomatic & polite way of saying that there is a 99.9999% chance that the $29.95 10.6 disk is only an update...not a full install.
Apple is also selling a 10.6 box set for $169...which includes a full install of OS 10.6, iWork 09, and iLife 09.
Why would someone pay $169 for these 3 programs...if the 10.6 $29.95 disk was a full install?
But here is how you know that it is not a full install (from the system requirements on the Apple website)...quote:
"Upgrading from Mac OS X v10.4 Tiger. If your Intel-based Mac is running Mac OS X v10.4 Tiger, purchase the Mac Box Set, which is a single, affordable package that includes Mac OS X v10.6 Snow Leopard; iLife ’09, with the latest versions of iPhoto, iMovie, GarageBand, iWeb, and iDVD; and iWork ’09, Apple’s productivity suite for home and office including Pages, Numbers, and Keynote.
Here's the link:
Apple - Mac OS X Snow Leopard - Technical specifications
Believe me...I would love the $29.96 10.6 update disk to be a full install!!!
- Nick