The two above these files (swfobject_modified.js and expressInstall.swf) are installed in a folder called a Script which Dreamweaver had created in the root of your site if it doesn't already exist.
The first two of these files (swfobject_modified.js and expressInstall.swf) are installed in a folder called Scripts, which Dreamweaver creates in the root of your site if it doesn't already exist.