Phlibby is so wrong! This IS Snow Leopard 10.6.7, I just cloned the ISO to a 16GB-USB-Stick (GUID, Mac Journaled Filesystem; 8GB-Stick is too small) via Carbon Copy Cloner. I booted from the Stick on an early 2011 Macbook Pro, that came preinstalled with Lion and was able to install Snow Leopard (on a beforehand installed empty internal SSD-Drive). It took me so fucking long to get rid of Lion and be able to install Snow Leopard on an early 2011 Macbook Pro, finally this ISO did the Trick, easy as outlined above.
OS X 10.6 Retail DVD Full Untouched, Burn with Disk Utility to DL-DVD and Install Enjoy. Word for mac free download.