Best way to setup AWStats?


I would like to install AWStats for a friend’s website hosted here on Dreamhost, but I’m not sure what would be the best way to run it. I installed it for a very small website of my own before, and run it on the archived access log to avoid losing data. My friend’s site is significantly larger though, so I think it might be better to run the script several times a day on the currently active log. But how would I do this without losing data between the time the script is run and the log files are rotated/archived? Has anyone done this before and can help? Thanks!