Image width and height with BBcode

An image with width and height displays faster and allow users to read the text faster on graphic intensive forums with tall images. I would like to include Image width and height BBcodes into PunBB which was sucessfully achieved in PhpBB. Here is the PhpBB version.

I've looked at parser.php and find it a bit complicated to try to change the code and done nothing. How can it be implemented in PunBB?

[img width=81 height=81]http://punbb.org/img/logo_1_light.png[/img]

example: Clear your cache and try reloading in a new window. Notice the images will load not the same time as the text.