Adsense Insertion Help please?

[emwonk]

Will somebody kindly tell me how/where I go to stick adsense code into the space just below my banner on the index page that lists all of the discussion areas?

The area I mean would be the spot immediately below the "Vbulleting.org" logo on this site. I figured out how to insert the adsense code into the space just to the right of my header image, but that doesn;t fit well onto smaller monitors.

I pondered the header section for a while, but could not locate whatever code is cntrolling my header jpeg, and as you can tell I'm a beginner programmer.

Thanks for any help you can provide.

best,

E