Ok, you got some reading to do before going too far. Working in the shell isn't for the faint hearted, but its the only way you'll get AWstats to run on a regular basis, that is what cron is for, it's basically a way to schedule the running of and applications and scripts.
Check out what Putty is in the wiki.
Take a look at the AWStats_Installation page in the Dreamhost Wiki. In that it explains how to setup a crontab.
When creating it, replace the crontab data in the wiki example with the data from the other site you linked and edit what you need to for your requirements.
Quick tip when using crontab, all the code below as posted on the other site needs to be on a single line. If you paste the line in using the Putty client, remove the line breaks by backspacing once at the start of each new line except the 1st.
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