lauching downloads

i am a new user to limewire and am having a few problems. im trying to lauch a programme that i have downloaded. how do i do this? i have double clicked on to launch but this hasnt worked. what shall i do?

it is probably compressed and you will need to Expand it using Stuffit. Because it is not set up to do this automatically, you will need to open your compression tool , Zip or Stuffit, and command it to decompress manually.