Dreams hd space idea

I noticed that when I run a dream, it copies to the c:\programdata directory and inside of it is just a .WMV which is fine..but if I download a dream and run it, I now have 2 copies of it on my harddrive. The original .dream file and the copy that was made in c:\programdata. The idea I have is, couldn't you make a .dream installer or program that lists your dreams, like a dream organizer so I could just double click the .dream file when I download it and it's installed and just have windows see the directory? That'll save peoples harddrive space, granted it is only 300mb at the moment for me, but say I download more and more dreams over time and have tons of dreams, now my 3gb of dreams is taking up 6gb of harddrive space if you get what I'm saying. I dunno.. just an idea to save HD space. Maybe trick windows dreamscape its running its own files?