Ok, this is a REALLY dumb question, but when i download an application, and get an icon like
, what should i do with these icons. Is it safe to delete them, because i have already installed Firefox and WMP, or should i just drag them into the finder?
Once again, forgive my mac newbiness, i have only been working with my mini for a couple of months.

Once again, forgive my mac newbiness, i have only been working with my mini for a couple of months.