Hello and welcome to the forums knight_ryda!


You should use Stuffit Expander. What you should do is search your hard drive for "Stuffit Expander" and open it. If you don't have Stuffit Expander you can download it for free from the link above. Next go to the File menu and come down to "Expand." A window will open and you will need to select the .sit file that you just downloaded and click choose. Stuffit Expander will expand the file and you can then run the installer to install LimeWire. I hope this helps.