ok...I get it...the other is for uninstall.
It actually shouldn't matter which one you run, I believe. I usually run the smaller of the 2. We actually have a new 1-click installer we are working on, and it will come with or w/o Postgresql. We are trying to simplify and streamline the install/setup process.
Thanks for response...a streamlined install woudl be a good edition. I just installed today, and while I thought the manual was pretty good I'd be embarassed to tell you how much time I spent getting it to work.