I've just been given an opportunity to sell ads direct for a short period of time, that is for an advertiser's very specific ad campaign. I'm running Adsense ads on the main section of my website, and those pages are all dynamically generated (my own custom CMS). Basically it is one template for many pages. I am using AdManager on a secondary portion of my site, so I could implement the AdManager code on the main portion. But my concern is that if I make this switch for a month or so that I will significantly disrupt my AdSense account/earnings. Also, I have only ever used AdSense to fill my AdManager inventory, are there any recommended resources or tutorial to show how to manage direct ad sales through AdManager.