Setup AWStats or similar stats script on Windows server

I have a Windows server running a number of websites. According to IIS, the sites are logging web traffic data. Some of the sites have AWStats setup and one has Webalizer setup, but not all of them have been setup correctly. I need to have a stats program working for one particular website on the server. It needs to be be able to display a web page of existing web stats data collected by the server, and all future web stats as they are collected. It is important that previous stats for the website can be viewed in the stats program. If you can get AWStats working, that would be great. Otherwise, an equivalent stats program would be sufficient. Please specify how you can solve this. Remote desktop and FTP access will be given, and funds will be released from GAF escrow as soon as the stats are setup as per requirements. If you can solve the problem for one website, I will offer you the additional work to set it up for more of the websites on the server. Please let me know if there are any questions.