Well I just put the code right under the private message section, but in doing so, it messes up the whole bottom of the page and the membership section ends up all mangled and squished. So for now I put everything back to where it was, until I can get an answer here on how to fix it.
So if you really want to do it this way, which I suggest you don't because we all know I am still learning and wouldn't want to be responsible for messing up your board, then just go to your template and find the code for the private messages and put the code under that. If you do this and then figure out how to make everything normal looking then please let me know