[FlyingDutchman]

in forumdisplay.php, find:

PHP Code:

if ($foruminfo['allowposting']==1) {
  eval("\$newthreadlink = \"".gettemplate('forumdisplay_newthreadlink')."\";");
} 


REPLACE that with:

PHP Code:

if ($foruminfo['allowposting']==1 && $forumid!=5 && $forumid!=6) {
  eval("\$newthreadlink = \"".gettemplate('forumdisplay_newthreadlink')."\";");
}
else {
  eval("\$newthreadlink = \"".gettemplate('forumdisplay_tutoriallink')."\";");
} 


where the forum id's of my toturial 'categories' are 5 and 6 (you can change them or add them like: && $forumid!=x where x is the forum id)

add a new template called 'forumdisplay_tutoriallink' with the following content:

PHP Code:

<a href="newthread.php?s=$session[sessionhash]&action=newthread&forumid=$foruminfo[forumid]"><img src="{imagesfolder}/newtutorial.gif" border="0" alt="Post New Tutorial"></a> 


finally upload the attached image to your imagesfolder...
i don't know if this is really what you want, and if you want other/more features, just ask me