First off, you cant use HTML on this board
This board uses BB code instead of HTML, which is almost the same except for the use of the <> and the img src,,,BB code uses [] and img,,,for example,,,,
[img]http://super.orcon.net.nz/esfor.jpg[/img]
would be the proper coding for inserting an image
Or you can just click the IMG button located on the "add post" window tool bar, insert the web address of the pic and the board will do the coding for you
It will be the same on your ES board bud
Also, on your boards ACP you can allow folks to post file attachments on your forum,,,This will allow folks to take pix directly off their computer and display them in their post
To do this you will need to edit the settings for each forum via the ACP
If you need further help with any of this, PM me and I will give you instructions as best I can