Can somebody teach me How to Automatic Template Changes System

[vuiveclub]

hello,
can someone teach me, how to Automatic Template Changes System ??
I created new hook forumdisplay_complete and with Plugin PHP Code:

PHP Code:

 if ($foruminfo['my_custom'] == 1) 
{ 
$vbulletin->templatecache['FORUMDISPLAY'] = str_replace(('<!-- show threads -->'),('<!-- show threads -->').$vbulletin->templatecache['my_custom_temp_to_change'],$vbulletin->templatecache['FORUMDISPLAY']); 
} 


But it didn't work, what did i do wrong?