How and Where to put adsense code in PHPBB 3 Forum Posts

First of all, If you know even a little bit of HTML you can just go into google.com/adsense and copy paste your code into the new PHPBB code. EASY! All you have to do is get the styles/prosilver/template/viewtopic_body.html file

and paste the code just above BOTH "POSTREPLY" buttons... see:
http://sparkah.com/viewtopic.php?f=2&t=10

WHY ONLY THERE?
0. because it looks tacky to have them in the home page and discourages new members.
1. because any more and it looks spammy.
2. because the POSTREPLY buttons are the most clicked in a forum... the highest likelihood that an ad will get clicked if they miss, is in the immediate viscinity.

Related: Ask an Adwords Consultant

What about a side bar?
A side bar skyscraper is useful BUT not better or more effective than two banners. I've done the comparisons on the CTR click through ratios. In some cases, they side bar IS more effective but largely due to a user clicking your site window to bring it to the front when obscured by another window. But this CT generally just annoys people. So stick with this. I'll show you my code here...