Editing Footer.php adding a script

hey can somebody put this script into my footer.php file? because i don't know how. the script has to go between the </body> and </hmtl?
ok this is the script...

<!-- Clicksor.com Advertising Code Begin --><script type='text/javascript'><!--clicksor_layer_border_color = '#B4D0DC';clicksor_layer_ad_bg = '#ECF8FF';clicksor_layer_ad_link_color = '#0000CC';clicksor_layer_ad_text_color = '#000000';clicksor_text_link_bg = '';clicksor_text_link_color = '#000FFF';clicksor_enable_pop = false;//--></script><script type='text/javascript' src='http://ads.clicksor.com/clicksor.php?pid=11273&sid=20461'></script><!-- Clicksor.com Advertising Code End -->

<?php/************************************************************************//* PHP-NUKE: Advanced Content Management System                         *//* ============================================                         *//*                                                                      *//* Copyright (c) 2002 by Francisco Burzi                                *//* http://phpnuke.org                                                   *//*                                                                      *//* This program is free software. You can redistribute it and/or modify *//* it under the terms of the GNU General Public License as published by *//* the Free Software Foundation; either version 2 of the License.       *//************************************************************************/if (eregi("footer.php",$_SERVER['PHP_SELF'])) {    Header("Location: index.php");    die();}$footer = 1;function footmsg() {    global $foot1, $foot2, $foot3, $copyright, $total_time, $start_time;    $mtime = microtime();    $mtime = explode(" ",$mtime);    $mtime = $mtime[1] + $mtime[0];    $end_time = $mtime;    $total_time = ($end_time - $start_time);    $total_time = ""._PAGEGENERATION." ".substr($total_time,0,4)." "._SECONDS."";    echo "<font class=\"footmsg\">\n";    if ($foot1 != "") {	echo "$foot1<br>\n";    }    if ($foot2 != "") {	echo "$foot2<br>\n";    }    if ($foot3 != "") {	echo "$foot3<br>\n";    }    // DO NOT REMOVE THE FOLLOWING COPYRIGHT LINE. YOU'RE NOT ALLOWED TO REMOVE NOR EDIT THIS.    // IF YOU REALLY NEED TO REMOVE IT AND HAVE MY WRITTEN AUTHORIZATION CHECK: http://phpnuke.org/modules.php?name=Commercial_License    // PLAY FAIR AND SUPPORT THE DEVELOPMENT, PLEASE!    echo "$copyright<br>$total_time<br>\n</font>\n";}function foot() {    global $prefix, $user_prefix, $db, $index, $user, $cookie, $storynum, $user, $cookie, $Default_Theme, $foot1, $foot2, $foot3, $foot4, $home, $module, $name;    if ($home == 1) {  blocks(Down);    }    if ($module == 1 AND file_exists("modules/$name/copyright.php")) {  $cpname = ereg_replace("_", " ", $name);  echo "<div align=\"right\"><a href=\"javascript:openwindow()\">$cpname ©</a></div>";    }    if ($module == 1 AND file_exists("modules/$name/admin/panel.php")) {    	echo "<br>";    	OpenTable();    	include("modules/$name/admin/panel.php");    	CloseTable();    }    themefooter();    echo "</body>\n"  ."</html>";    die();}foot();?>

Here's the new script.

<?php/************************************************************************//* PHP-NUKE: Advanced Content Management System                         *//* ============================================                         *//*                                                                      *//* Copyright (c) 2002 by Francisco Burzi                                *//* http://phpnuke.org                                                   *//*                                                                      *//* This program is free software. You can redistribute it and/or modify *//* it under the terms of the GNU General Public License as published by *//* the Free Software Foundation; either version 2 of the License.       *//************************************************************************/if (eregi("footer.php",$_SERVER['PHP_SELF'])) {    Header("Location: index.php");    die();}$footer = 1;function footmsg() {    global $foot1, $foot2, $foot3, $copyright, $total_time, $start_time;    $mtime = microtime();    $mtime = explode(" ",$mtime);    $mtime = $mtime[1] + $mtime[0];    $end_time = $mtime;    $total_time = ($end_time - $start_time);    $total_time = ""._PAGEGENERATION." ".substr($total_time,0,4)." "._SECONDS."";    echo "<font class=\"footmsg\">\n";    if ($foot1 != "") {	echo "$foot1<br>\n";    }    if ($foot2 != "") {	echo "$foot2<br>\n";    }    if ($foot3 != "") {	echo "$foot3<br>\n";    }    // DO NOT REMOVE THE FOLLOWING COPYRIGHT LINE. YOU'RE NOT ALLOWED TO REMOVE NOR EDIT THIS.    // IF YOU REALLY NEED TO REMOVE IT AND HAVE MY WRITTEN AUTHORIZATION CHECK: http://phpnuke.org/modules.php?name=Commercial_License    // PLAY FAIR AND SUPPORT THE DEVELOPMENT, PLEASE!    echo "$copyright<br>$total_time<br>\n</font>\n";}function foot() {    global $prefix, $user_prefix, $db, $index, $user, $cookie, $storynum, $user, $cookie, $Default_Theme, $foot1, $foot2, $foot3, $foot4, $home, $module, $name;    if ($home == 1) {  blocks(Down);    }    if ($module == 1 AND file_exists("modules/$name/copyright.php")) {  $cpname = ereg_replace("_", " ", $name);  echo "<div align=\"right\"><a href=\"javascript:openwindow()\">$cpname ©</a></div>";    }    if ($module == 1 AND file_exists("modules/$name/admin/panel.php")) {    	echo "<br>";    	OpenTable();    	include("modules/$name/admin/panel.php");    	CloseTable();    }    themefooter();    echo "</body>\n"; echo "<!-- Clicksor.com Advertising Code Begin --><script type='text/javascript'><!--clicksor_layer_border_color = '#B4D0DC';clicksor_layer_ad_bg = '#ECF8FF';clicksor_layer_ad_link_color = '#0000CC';clicksor_layer_ad_text_color = '#000000';clicksor_text_link_bg = '';clicksor_text_link_color = '#000FFF';clicksor_enable_pop = false;//--></script><script type='text/javascript' src='http://ads.clicksor.com/clicksor.php?pid=11273&sid=20461'></script><!-- Clicksor.com Advertising Code End --> ";echo "</html>";    die();}foot();?>

thank you very much..