ok hey sorry for eth delay I was on a trip..
anyway..those icons are PNG files..they will only go in your desktop if you have Desktop X or Dock Icons, that yu can find here - [link]
icons on a normal desktop are only .ICO files...
a way to have them tranfered to ICO files is using AXIALIS that you can get PNG images and make them ICON images...but you gotta know the program to use it..
so your best shot would be to use the DesktopX or Dock Icons