adsense on blogs

hello guys,

im VERY new (totally new) at blogging ,just created a blog , and downloaded a free theme (which i will try to customize a bit , while experimenting with it) , this free theme i downloaded is widget and adsense ready , now my blog ( www.niekplays.com/blog ) allready seems to have some adsense banners on it , that came with the free theme . Here comes my n00b question , HOW do i change those banners? Im about to make my own adsense account , and would like to know how to change it.

Thank you in advance

Assuming it is done within the templates, edit the header and sidebar php / theme files by going to the presentation tab in wp-admin, and them theme editor. Depending on the theme, you may have a left and right sidebar since its two columns, but either way, if you look through those you will see the adsense code. You may opt to just edit the theme files locally using your favorite editor.