* Byron walking up to the podium. *
Firstly I would like to thank Fastforward for writing this and thanks to steven and auto for the .htaccess.
* Speech end. *
Feedback to those using the .htaccess method.
I have got it running by removing the "s$session[sessionhash]" part in step 2 & 3, using hard coded url for all instances of $bburl and using the the following in my .htaccess.
RewriteEngine on
RewriteRule ^f([0-9]+)/?$ forumdisplay.php?forumid=$1&s=$2 [L]
RewriteRule ^t([0-9]+)\.html$ showthread.php?threadid=$1 [L]
RewriteRule ^t([0-9]+)-([0-9]+)\.html$ showthread.php?threadid=$1&perpage=15&pagenumber=$ 2 [L]
RewriteRule ^f([0-9]+)-([0-9]+)/$ forumdisplay.php?forumid=$1&daysprune=1000&sortord er=&sortfield=lastpost&perpage=40&pagenumber=$2 [L]
RewriteRule ^[ft]([0-9]+)/s([^/]*)/(.+)$ /$3 [L]
Step 2 & 3
<a href="$bburl/f$forum[forumid]/">$forum[title]</a>
<a href="$bburl/t$thread[threadid].html">$thread[title]</a>
That's all.
Wait. That's not the end. Need to confirm.
To Fastforward and the rest : Did i miss out anything by using the above .htaccess and removing the "s$session[sessionhash]" in step 2 &3?
Thanks. Cheers to vB.

Byron