I have made original Dani instructions in phpBB mode like format that i hope will be of use to you.
Here it is:
##############################################################
## Hack Title: vBulletin 3x mod_rewrite
## Author: Dani http://www.daniweb.com/
## Contributor: Gandalf Forums Directory - remake into phpBB mods like format
## Description: make your vBulletin forum search engine spiderable - for Google and all the others
##
## Compatibility: 3x
##
## Installation Level: Moderate
## Installation Time: 20 Minutes
##
## Files To Edit: 10
## forumhome_forumbit_level1_nopost
## forumhome_forumbit_level1_post
## forumhome_forumbit_level2_nopost
## forumhome_forumbit_level2_post
## forumhome_subforumbit_nopost
## forumhome_subforumbit_post
## forumhome_lastpostby
## threadbit
## forumdisplay.php
## showthread.php
##
## Included Files: 1
## .htaccess
##
##
##
## Support: http://www.daniweb.com/techtalkforums/thread17549.html
## Copyright: Copyright © 2004 Danielle Horowitz http://www.daniweb.com/
##
#
#-----[ CREATE .htaccess file]------------------------------------------
#RewriteEngine on
Options +FollowSymLinks
RewriteRule ^thread([0-9]+).html$ showthread.php?t=$1 [L]
RewriteRule ^lastpostinthread([0-9]+).html$ showthread.php?goto=lastpost&t=$1 [L]
RewriteRule ^newpostinthread([0-9]+).html$ showthread.php?goto=newpost&t=$1 [L]
RewriteRule ^forum([0-9]+).html$ forumdisplay.php?f=$1 [L]
#----[GO TO Styles & Templates/Style Manager/Edit Templates/Forum Home Templates/]
#
#----[OPEN]---------------------------
#
#forumhome_forumbit_level1_nopost
#forumhome_forumbit_level1_post
#forumhome_forumbit_level2_nopost
#forumhome_forumbit_level2_post
#forumhome_subforumbit_nopost
#forumhome_subforumbit_post
#
#
#----Find in above templates-----------------a href="forumdisplay.php?$session[sessionurl]f=$forum[forumid]">
#----Replace with-----------------------------
<a href="forum$forum[forumid].html">
#
#----[OPEN forumhome_lastpostby template]-------------
#
#----Find---------------------------------------<a href="showthread.php?$session[sessionurl]goto=newpost&t=$lastpostinfo[lastthreadid]" title="<phrase
1="$lastpostinfo[lastthread]">$vbphrase[go_first_unread_in_thread_x]</phrase>"><strong>$lastpostinfo[trimthread]</strong></a>
#
#----Replace with----------------------------
#<a href="newpostinthread$lastpostinfo[lastthreadid].html" title="<phrase 1="$lastpostinfo[lastthread]">$vbphrase[go_first_unread_in_thread_x]</phrase>"><strong>$lastpostinfo[trimthread]</strong></a>
#
#----Find---------------------------------------
#<a href="showthread.php?$session[sessionurl]goto=lastpost&t=$lastpostinfo[lastthreadid]"><img class="inlineimg" src="$stylevar[imgdir_button]/lastpost.gif" alt="$vbphrase[go_to_last_post]" border="0"
/></a>
#
#----Replace with----------------------------
#<a href="lastpostinthread$lastpostinfo[lastthreadid].html"><img class="inlineimg" src="$stylevar[imgdir_button]/lastpost.gif" alt="$vbphrase[go_to_last_post]" border="0" /></a>
#
#----Find---------------------------------------
#<a href="showthread.php?$session[sessionurl]goto=lastpost&t=$lastpostinfo[lastthreadid]"><img class="inlineimg" src="$stylevar[imgdir_button]/lastpost.gif" alt="$vbphrase[go_to_last_post]" border="0"
/></a>
#
#----Replace with----------------------------
#<a href="lastpostinthread$lastpostinfo[lastthreadid].html"><img class="inlineimg" src="$stylevar[imgdir_button]/lastpost.gif" alt="$vbphrase[go_to_last_post]" border="0" /></a>
#----[GO TO Styles & Templates/Style Manager/Edit Templates/Threadbit Templates/]
#
#-----[OPEN threadbit template]-------------
##
#----Find---------------------------------------
#
<a href="showthread.php?$session[sessionurl]goto=lastpost&t=$thread[threadid]">#
#----Replace with----------------------------
#<a href="lastpostinthread$thread[threadid].html">
#
#----Find---------------------------------------
#<a href="showthread.php?$session[sessionurl]goto=newpost&t=$thread[threadid]">
#
#----Replace with----------------------------
#
<a href="newpostinthread$thread[threadid].html">#
#----Find---------------------------------------
#<a href="showthread.php?$session[sessionurl]t=$thread[threadid]$thread">
#
#----Replace with----------------------------
#<a href="thread$thread[threadid].html">
#
#----Find---------------------------------------
#<a href="showthread.php?$session[sessionurl]t=$thread[threadid]&goto=lastpost$thread">
#
#----Replace with----------------------------
#
<a href="lastpostinthread$thread[threadid].html">
#----[GO TO Styles & Templates/Style Manager/Edit Templates/Navigation / Breadcrumb templates/]
#----[OPEN navbar]
#
#---[Find (2 instances)]--------------------------
#
<a href="$vboptions[forumhome].php?$session[sessionurl]" accesskey="1">
#
#---[Replace with]--------------------------------
#
<a href="./" accesskey="1">#----[OPEN forumdisplay.php]-------------------
#
#----Find--------------
#
foreach ($parentlist AS $forumID)
{
$forumTitle = $forumcache["$forumID"];
$navbits["forumdisplay.php?$session[sessionurl]f=$forumID"] = $forumTitle;
}
#
#----Replace with------
#
foreach ($parentlist AS $forumID)
{
$forumTitle = $forumcache["$forumID"];
$navbits["forum$forumID.html"] = $forumTitle; // edited by dani
}#----[OPEN shwothread.php]-------------------
#
#----Find---------------------------------------
#
foreach ($parentlist AS $forumID)
{
$forumTitle = $forumcache["$forumID"];
$navbits["forumdisplay.php?$session[sessionurl]f=$forumID"] = $forumTitle;
}
#
#----Replace with----------------------------
#
foreach ($parentlist AS $forumID)
{
$forumTitle = $forumcache["$forumID"];
$navbits["forum$forumID.html"] = $forumTitle; // edited by dani
}#
#-----[ SAVE/CLOSE ALL FILES ]------------------------------------------
#
# EoM
I am not sure if this was already mentioned but when applying this code to latest vBulletin version i have 3.0.6 i faced a problem with the following code
<a href="forum$forum['forumid'].html">and changing it to
<a href="forum$forum[forumid].html">solved the problem.
