Create nero.html
Create nero.html

This file must be placed in forum/store/customcode
It may be renamed, as a matter of fact, it might be wise to rename it

In Marttiphpbb's custom code extension, go to the edit overal_header_content_before.html and enter the next line:
<!-- INCLUDE ../../../../../../store/customcode/nero.html -->
WiMaPe/phpBB3.1-adblock-detector