I'm having the same problem. I think it stems from the fact that the files I downloaded were "MagicISO" files. I have Magic ISO, but it won't let met burn anything over 300 megs, so I went and burned it with Alcohol 120%. Does anyone have a fix for this? Burning it to a CD and mounting it both result in a the launcher coming up, then going away and staying in the background for awhile without doing anything.