Newbie please help seo

##################################################  ############ 
## MOD Title: phpBB google keyword URLs 1.1.0 
## MOD Author: webmedic (bah@webmedic.net) <Brook Hyumphrey> http://www.webmedic.net 
## Original code from: http://www.webmasterbrain.com/forum/question-static-sef-urls-for-phpbb-vt34.php 
## MOD Description: This mod makes static URLs for phpBB 
## Please read the author notes BEFORE using this mod. 
## Check http://www.webmedic.net/released-phpbb-google-keyword-urls-110-vt2577.html 
## for the latest version or to get help with this MOD 
## 
## MOD Version: 1.1.0 
## 
## Installation Level: (Advanced) 
## Installation Time: 5 Minutes 
## Files To Edit: (3) 
## page_header.php, 
## page_footer.php, 
## .htaccess 
## Included Files: n/a 
##################################################  ############ 
## Author Notes: 
## Use this mod together with the manage bots mod already included with integramod 
## Make backups and test this on a test forum if you can. This is not a typical mod. 
## This version is not like all the other mod rewrite and search engine optimization mods 
## out there. It will make your urls into keword phrases. to do this it rewrites the url 
## to look like the topic or forum title. 
## To see this mod in action please goto: 
## http://www.webmedic.net/index.php 
## 
##################################################  ############ 
## MOD History: 
## 
## 2004-11-03 - Version 1.1.0 
## - Added replacements for /, \, and foriegn character sets. 
## 
## 2004-08-22 - Version 1.0.0 
## - Initial public release. 
## 
##################################################  ############ 
## Before Adding This MOD To Your Forum, You Should Back Up All Files Related To This MOD 
##################################################  ############ 


# 
#-----[ OPEN ]------------------------------------------ 
# 

includes/page_header.php 

# 
#-----[ FIND ]------------------------------------------ 
# 

$template->set_filenames(array( 
'overall_header' => ( empty($gen_simple_header) ) ? 'overall_header.tpl' : 'simple_header.tpl') 
); 

# 
#-----[ AFTER, ADD ]------------------------------------------ 
# 

ob_start(); 


function make_url_friendly($url) 
{ 

$url = strtolower($url); 

$find = array(' ', 
'&', 
'\r\n', 
'\n', 
'/', 
'\\', 
'+'); 

$url = str_replace ($find, '-', $url); 

$find = array(' ', 
'é', 
'è', 
'ë', 
'ê'); 

$url = str_replace ($find, 'e', $url); 

$find = array(' ', 
'ó', 
'ò', 
'ô', 
'ö'); 

$url = str_replace ($find, 'o', $url); 

$find = array(' ', 
'á', 
'à', 
'â', 
'ä'); 

$url = str_replace ($find, 'a', $url); 

$find = array(' ', 
'í', 
'ì', 
'î', 
'ï'); 

$url = str_replace ($find, 'i', $url); 

$find = array(' ', 
'ú', 
'ù', 
'û', 
'ü'); 

$url = str_replace ($find, 'u', $url); 

$find = array('/[^a-z0-9\-<>]/', 
'/[\-]+/', 
'/<[^>]*>/'); 

$repl = array('', 
'-', 
''); 

$url = preg_replace ($find, $repl, $url); 

return $url; 

} 


function rewrite_urls($content) 
{ 

function if_query($amp) 
{ 

if($amp != '') 
{ 
return '?'; 
} 

} 

$url_in = array('/(?<!\/)viewforum.php\?f=([0-9]+)((&)|(&)){0,1}([^>]+>)(.*?)<\/a>/e', 
'/(?<!\/)viewtopic.php\?p=([0-9]+)((&)|(&)){0,1}([^>]+>)(.*?)<\/a>/e', 
'/(?<!\/)viewtopic.php\?t=([0-9]+)((&)|(&)){0,1}([^>]+>)(.*?)<\/a>/e'); 

$url_out = array("make_url_friendly('\\6') . '-vf\\1.html' . if_query('\\2') . stripslashes('\\5\\6') . '</a>'", 
"make_url_friendly('\\6') . '-vp\\1.html' . if_query('\\2') . stripslashes('\\5\\6') . '</a>'", 
"make_url_friendly('\\6') . '-vt\\1.html' . if_query('\\2') . stripslashes('\\5\\6') . '</a>'"); 

$content = preg_replace($url_in, $url_out, $content); 

return $content; 

} 

# 
#-----[ OPEN ]------------------------------------------ 
# 

includes/page_tail.php 

# 
#-----[ FIND ]------------------------------------------ 
# 

if ( $do_gzip_compress ) 
{ 
// 
// Borrowed from php.net! 
// 
$gzip_contents = ob_get_contents(); 
ob_end_clean(); 

$gzip_size = strlen($gzip_contents); 
$gzip_crc = crc32($gzip_contents); 

$gzip_contents = gzcompress($gzip_contents, 9); 
$gzip_contents = substr($gzip_contents, 0, strlen($gzip_contents) - 4); 

echo "\x1f\x8b\x08\x00\x00\x00\x00\x00"; 
echo $gzip_contents; 
echo pack('V', $gzip_crc); 
echo pack('V', $gzip_size); 
} 

# 
#-----[ REPLACE, WITH ]------------------------------------------ 
# 

if ( $do_gzip_compress ) 
{ 
// 
// Borrowed from php.net! 
// 
$gzip_contents = ob_get_contents(); 
ob_end_clean(); 
echo rewrite_urls($contents); 
global $dbg_starttime; 

$gzip_size = strlen($gzip_contents); 
$gzip_crc = crc32($gzip_contents); 

$gzip_contents = gzcompress($gzip_contents, 9); 
$gzip_contents = substr($gzip_contents, 0, strlen($gzip_contents) - 4); 

echo "\x1f\x8b\x08\x00\x00\x00\x00\x00"; 
echo $gzip_contents; 
echo pack('V', $gzip_crc); 
echo pack('V', $gzip_size); 
} 
else 
{ 
$contents = ob_get_contents(); 
ob_end_clean(); 
echo rewrite_urls($contents); 
global $dbg_starttime; 
} 

# 
#-----[ OPEN ]------------------------------------------ 
# 

.htaccess 

# 
#-----[ ADD ]------------------------------------------ 
# 

Options +FollowSymlinks 

RewriteEngine On 
#this may cause isues with subdirs and so I have not enabled it. 
#RewriteBase / 

RewriteRule [.]*-vf([0-9]*) viewforum.php?%{QUERY_STRING}&f=$1 
RewriteRule [.]*-vp([0-9]*) viewtopic.php?%{QUERY_STRING}&p=$1 
RewriteRule [.]*-vt([0-9]*) viewtopic.php?%{QUERY_STRING}&t=$1 


# 
#-----[ SAVE/CLOSE ALL FILES ]------------------------------------------ 
#