How to combine two hacks that want to modify the same code?

[JJR512]

The microstats hack wants to change this code:

PHP Code:

  while ($var=$DB_site->fetch_array($vars)) {
    if ($var['findword']!="") {
      $newtext=str_replace($var['findword'],$var['replaceword'],$newtext);
    }
  } 


With this:

PHP Code:

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


The username in post hack wants to replace the same bit of code with this:

PHP Code:

  $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); 


How can I combine those two new bits of code into one bit of code that allows both hacks to function properly?