The file includes a list of the files that make up the package (and their locations), and is included with the driver installation program.
Generally, the file is located on the driver installation media in the same folder as the Setup program, or in a subfolder.
Download and save a copy of the i Tunes (or i Tunes64setup.exe) installer file to your hard drive: Download and install the free trial version of Win RAR: Right-click the i Tunes (or i Tunes64setup.exe), and select "Extract to i Tunes Setup" (or "Extract to i Tunes64Setup").
That means that in most cases, you need to jump from application to application, looking for the different methods of updating your apps.
But we would recommend you just flip the Automatic Updates switch and silently get updates on a regular basis. You can get a trial AVG PC Tune Up here free for 30-days.