Username in posts and microstats

[Boofo]

Can anyone plaese help me with the following code? I had microstats installed and working and when I installed the username in posts hack, microstats quit working. I know the problem in the code, just not how to fix it so both of them will work. I know it can be done because they both work here.

$findwords=array(0 => '{getmicrostats}');
  $replacewords=array(0 => $microstats);
  $i=1;

  $findwords=array(0 => '{bbusername}');
  $replacewords=array(0 => "$bbuserinfo[username]<!-- auto name hack -->");
  $i=1;
  while ($var=$DB_site->fetch_array($vars) and $i++) {
    if ($var['findword']!='') {
      $findwords[$i]=$var['findword'];
      $replacewords[$i]=$var['replaceword'];
    }
  }
  $newtext=str_replace($findwords,$replacewords,$newtext);