Set-up Co-Op Mutliple URL's - How To?

I am sure many of you have done this. I would like to put my co-op code on multiple sites. Is there a special process I need to go through or do I just add the code to the new sites and pull the ad_network_381.php file into the main directory of that site as well?

 

You need to submit new accounts per site - then "set weight" to your main account.