Windows can't open this file: Loader.swf
You'll need to download the
Flash Player Projector from the Adobe website, copy it to a persistent location (e.g. c:\program files\adobe\flashplayer_22_sa.exe), and then register it as the default application for opening SWF files.
Or you could install
sby's Loader pack, which includes a copy of the standalone Flash Player (and also a shortcut, which will launch the Loader
regardless of whether you've registered the standalone player).
Or you can drag-drop the Loader.swf file into a web browser window. This
isn't recommended, but it will usually work.
Or you could have glanced through the newbie resources which I linked at the top of this page, wherein you would have found the advice that I've just reiterated.
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Please remember that there are limits to the time and generosity of modders. Whenever they spend a minute investigating a problem or answering a question, that's a minute that they
cannot spend creating new SDT content for people to enjoy.
You're welcome to ask for help, but please avail yourself of the FAQs and sticky threads before doing so.