How do I decode these .rar, .r01, .r02, etc. files?
Get RAR (or more specifically, its companion program, unrar) or WinRAR. The procedure and commands are much the same as for ARJs. An example might be: [unrar x -v -y msoffice.rar d:\temp]. if there is no .rar file, use the lowest numbered extension. Also, remember that unrar.exe must be in your PATH or present in the directory.