make sure you read this:
http://www.wowinterface.com/forums/s...ead.php?t=1066
Also, please note that most addons are zipped with the structure already there. Basically that means that when you unzip an addon you will get something like this:
<ZipName>/Interface/AddOns/<ModName>/<ModFiles>
You need to go into these folders and copy the folder <ModName> into your WOW AddOn folder. Many people copy the full folder at <ZipName> into the addon folder, and then wonder why it doesn't work...
Swweepyish specifically unzips as follows:
sweepyish_3-00/<VariousModFolders>
You need to go into the swwepyish_3-00 folder and then copy all of the subfolders in there to your wow/interface/addons folder. This should make it work...