hack reduce image 3.6.4 down speed connection

[bb2005]

Hi,

I used a hack to reduce images width size in my forum ( the hack needs to replace the file class_bbcode.php ), but I found that this hack make the forum very slow, so I asked Vbulletin support if there is another solution to reduce the image size after the script of the page download, so the visitor can see the page and wait to see the images after, they said no way, maybe the solution to find a hack.

So there is someone here can help me to find a hack that can reduce image size without make my forum slower ???

Thanks in advance, and I will be waiting your help.

best regards,
bb