Templatecache vB 3.8 to vB 4.0

[RobDog888]

Im in the process of upgrading my custom plugins from vB 3.8 to 4.0 and the fetch_template doesnt exist anymore. Not a problem but replacing/modifying templates that are cached is now a problem. There are no hooks where I need them so this still has to be the way I have to do it. It works in 3.8

This is a simplified example of a plugin in parse_templates:

$find = '{vb:rawphrase all_times_are_gmt_x_time_now_is_y}';
$replace = ' Blah';
$vbulletin->templatecache['footer'] = str_replace($find, $find.$replace, $vbulletin->templatecache['footer']));

But for some reason the text isnt appending.