Custom WOL for mod_rewrite

[AudioFX]

Hi There

I am currently in the process of using mod_rewrite to creating SE friendly URL's.
At this stage I am only re-writing showthread, forumdisplay, and member.php urls.
Now when the URL's change, the user activities are all messed. I have traced the inner workings of WOL to functions_online.php.
For a URL as thread154.html, I had to add the following code:

PHP Code:

  if (strpos($filename, "thread") === 0) {
    $values = array("t" => str_replace(array(".html", "thread"), "", $filename));
    $filename = "showthread.php";
  } 


I was wondering if there was any easier way to adjust the user locations, or would this be the best method?
Thank you for any suggestions