While it is not your direct problem I can tell you are on the 'simple' one click install. Flip over and do a custom install instead. The blanks on that screen are a little more intuitive anyway.
'simple' means the files will be stored ina central repository in a way that you can't manipulate, and a better name for 'simple' would be 'central'
'custom' means files installed in your own directory.
FYI -- with 'simple' you can not add scripts, themes etc....