same old wp page navi problems

Hello,

I am using a theme called royalpaper, and I am trying to use the wp pagenavi for the navigation bar. But where do I put the code in my theme?

This theme keeps giving me problems, and I have been reading forums all day to find the answer to how to activate the plug-in wp page navi. Finally I deleted some text from the functions.php and at least I was able to activate the plug-in, but I still do not know where to put the code.

Any help is much appreciated!

mysite

Thank you