Adding lines to xml?

[Phalcor]

This is a link to the post I made not to long ago, I'm trying to get drums infocenter to work, was wondering if anyone could tell me how to add these lines in.

http://www.eq2interface.com/download...enterv3.4.html

All I'm getting is a black screen, I tried to add the lines :

<include>eq2ui_custom_infocenter.xml</include>
<include>InfoCenter/includes.xml</include>

By right clicking the xml file and just copy / paste to the end of the document ( opened it with notepad ). Not sure what I am doing wrong...