if you have winrar installed
you right click on the downloaded file, then click "open with winrar"
then double click the "SETUP.EXE" file.
if you don't have winrar installed.............
when you double click the downloaded file.......take a note of where the files are extracted to............then go to that folder..and doulbe click the setup file..........in this case it will look like a pc....and will be called a setup launcher...........