yea u need a special program to unzip those winrar is one i think theres others not sure check download.com
dont worry its still a .zip lollers, winrar just default opens it, just extract it like u would normally, or double click on the files in winrar i coulda swore u made another topic like this and i already posted in it :\
Once you download the rar file, double click the rar file icon to open it in WinRar, select all the files, click "Extract to" enter a destination and press "ok"
Glad i could help. It can be confusing when you first use it, but it really is quite easy. And a lot of people save stuff as .rar now, so it comes in handy