If you want to add extra icons to the toolbar, do the following:
Make sure the icons are the same size as the rest of the toolbar icons. (32x32 - 256 color)
These icons also get added to the Program Files\IceChat7\Icons folder.
You may need to create this folder yourself.
Edit the icechat.ini file and manually add the following to the end, changing the name of the ico file, and the command you wish to issue when that button is clicked
n1=name1.ico:/echo -a I press new icon 1
n2=name2.ico:/echo -a I presed new icon 2
You will need to restart IceChat to see the new icons.