The "zip" files I've used are self installing. But as a suggestion, (and by no means do I know if this is the correct way of doing this), when I download a new program I go to My Computer, find Programs, and copy all the files into a new folder. Then I make a shortcut from the .exe file and place it on my Desktop. So far it seems to work.
If anyone out there is reading this thread and rolling your eyes because I'm mistaken and dumb, please feel free to let me know the correct way of loading programs. I always like to learn the "how to's".
Good luck and thanks.