Integration of "WP Post to PDF" similar to "WP Print" or "WP Mail"

First of all, I am a newbie to Wordpress and Atahualpa. But with this framework I could develop in a short time a really attractive intranet site for us. Great work from you - I'm thrilled. You've got a new fan

Now I would like to integrate the plugin "WP Post to PDF.
Therefore I can insert the following code anywhere in my theme:
But similar to "WP-Print and WP-Mail" I would like to embed the "WP Post to PDF"-Icon in the byline-area. Where should I insert the code for it.

By the way - I'm using Version 3.6.7 - where i can't place PHP-Code in the Option-Pages of Atahualpa.
As far as I know, I have this change then perform again with every update of Atahualpa framework. Or is there a solution that I can avoid it?

Thanks for your help.
Ralf