Hi
When the things are unstuffed, do u then see a white icon on your desktop that looks like a removable drive bearing the name of the unstuffed program?
If that's the case, doubleclick on that one and u'll see a screen with the icons of the programm, the tutorials, readme's etc.
Those u can select and drag into your folder ' applications'. When u do so a screen says: identity check or something. Fill in there as your name or "root" and the password that belongs to it. And then the programm is in your applicationsfolder. Then you can move all the things lingering on your desktop to the recyclebin.
You could drag then the programmicon from the applicationsfolder onto the desktop or into the dock as a shortcut.
I hope this will help you. If it is a different problem then i don't know right now an appropriate answer.
;-) Sanne