There are no tutorials as far as I know.
If you want to do it accross the entire site, you will need to modify page/layouts/... to display sidebar-alt by default. You can then extend page/elements/sidebar_alt with your ads content.
Actually I don't know coding. Can you explain which codes on which pages I have to change? I saw some pages "one_column" , "one_sidebar" , "two_column_left_sidebar" and "two_sidebar". Which one will I work on?
all of them, if you want to your ads to be displayed on all pages.
I found Terms: http://www.okul-online.com/terms :)
With: IE, Firefox, Chrome, Opera
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