Help!!! Installation Code issues…..

I am trying to install this as the other forum plugin I was using is no longer up for download so can some one help with install problems….

There are just a few things on the install.xml file that do not add up…

function phpbb_check_hash($password, $hash)Where is that in the includes/functions.php as I can not find it….

Next where is the style.php file its asking to edit its not there….

Next one is overall_header.html

Where is <script type="text/javascript"> edit as its not there…

Next where is the editor.js file its asking to edit its not there….

Are the edits for this mod right as it looks like this mods is a died mod…. Lets hope not and some one can help with the problems…

https://ww.wp.xz.cn/plugins/wp-united/