Here is the really short summary:
There's also a How-To written by Simon Handfield, which explains how to get started in more detail with lots of pictures.
(Some unzip programs are broken, and do not create folders when they should. If you don't have a folder called lang inside the analog folder, create one and put all the files called *.lng and *.tab into it.)
There are two ways of running analog. You can either run it from Windows (by single-clicking or double-clicking on its icon, depending on your setup), or you can run it from the DOS command prompt (under Start-Programs). If you run it from Windows, it will create a DOS window to run in. When it's finished, it will produce an output file called Report.html and some graphics; and a file called errors.txt which contains any errors there might have been. The first time you run it, this will all happen almost instantly. This is not a bug. For help in interpreting the output, see What the results mean.
LOGFILE logfilename # to set where your logfile livesThe logfile must be stored locally -- analog won't use FTP or HTTP to fetch it from the internet. There's a sample logfile supplied with the program.
There are already some configuration commands to get you started in the configuration file, but there are lots of others available. You can find the most common ones in the section on basic commands later in the Readme, and you can read about all of them in the section on customising analog. There are also some sample configuration files in the examples folder.
If you run analog from the DOS command prompt, there is another way to give options, via command line arguments, given on the command line after the program name. These are just shortcuts for configuration file commands. You can use the command line arguments if you run analog from a batch file too.
If you want to compile your own version of analog (it's written in C), or just to read the source code, it's available from the analog home page. (It's the same source code for all versions).
Need help with analog? Use the analog-help mailing list.