There is no "Archive and Install," though there is a non-upgrade install clearly in the earlier linked image. It's how I installed. SL is built to install on a blank disk, though does this violate licensing is another question.
BTW, anyone else having problems with dock/in finder application icons? A few of mine are blank. Seems a few others are experiencing similar, though I haven't found a solution.
Apple - Support - Discussions - No icons? Snow Leopard ***? ...