Archivers

In order to make or install mods, especially install, you are going to need an archiver that will easily manage your extracted files without jacking them up. I recommend that you use one of the following archivers or, if you know what you're doing, you can do it the hard way:

7ZIP (free and works GREAT): 7ZIPsetup.exe

WinRAR (free and works GREAT) RARSoftware.exe